Dynamically configuring a proxy server using containerization for concurrent and/or overlapping backup, restore, and/or test operations

ABSTRACT

An illustrative data storage management system relies on a specially configured proxy server to operate software containers on a proxy server, maintain resources needed by the software containers, and interwork with other system components. Illustratively, a catalog service on the proxy server maintains a software cache according to maintenance rules and also maintains an associated cache catalog. The software containers are generally managed and operated by an illustrative container manager also hosted by the proxy server. The illustrative software cache comprises contents needed by the software containers, such as pre-configured container templates, DBMS software components, lightervisors representing target operating systems, and storage management software for performing test and storage operations. The maintenance rules govern when cache contents should be purged and moved into offline archive copies.

INCORPORATION BY REFERENCE TO ANY PRIORITY APPLICATIONS

Any and all applications, if any, for which a foreign or domestic priority claim is identified in the Application Data Sheet of the present application are hereby incorporated by reference in their entireties under 37 CFR 1.57.

COPYRIGHT NOTICE

A portion of the disclosure of this patent document contains material which is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document and/or the patent disclosure as it appears in the United States Patent and Trademark Office patent file and/or records, but otherwise reserves all copyrights whatsoever.

BACKGROUND

Businesses recognize the commercial value of their data and seek reliable, cost-effective ways to protect the information stored on their computer networks while minimizing impact on productivity. A company might back up critical computing systems such as databases, file servers, web servers, virtual machines, and so on as part of a daily, weekly, or monthly maintenance schedule. The company may similarly protect computing systems used by its employees, such as those used by an accounting department, marketing department, engineering department, and so forth. Given the rapidly expanding volume of data under management, companies also continue to seek innovative techniques for managing data growth, for example by migrating data to lower-cost storage over time, reducing redundant data, pruning lower priority data, etc. Enterprises also increasingly view their stored data as a valuable asset and look for solutions that leverage their data. For instance, data analysis capabilities, information management, improved data presentation and access features, and the like, are in increasing demand.

One well known barrier to efficient and effective backups, especially in regard to large and very active transactional databases, can be the duration of time taken up by backup operations, even incremental backups. In some scenarios, the duration of the backup operation is longer than the desired time interval to the next backup, which results in a scenario where backup operations overlap as to any given database management system (DBMS). In regard to a set of diverse database management systems, multiple backup operations may occur concurrently or may overlap over time as well. Due to limitations in namespace allocations and namespace usage on ordinary proxy servers that process the backups in a traditional storage management system, multiple proxy servers are needed to handle the ongoing and overlapping backup operations of diverse databases, or even of one active transactional database. The result is substantially increased network complexity and higher costs for equipment, database licensing fees, maintenance, and administration. A more streamlined approach is desirable.

SUMMARY

Traditional storage management systems can experience significant shortcomings when backup operations take longer than the interval between point-in-time snapshots of database data, because in such situations backup operations will overlap as one backup starts before its predecessor ends. Due to namespace limitations on any given server, a DBMS software accessing a certain data source, e.g., a database named “employeeDB”, cannot run concurrently with another instance of itself also configured to use the “employeeDB” database, because the identical database names clash. Thus, overlapping backups of the same source database require separate servers or else the database data sources would have to be renamed to avoid namespace clashes. Likewise, if one wanted to test a certain database data source while a backup or restore (or other storage operation) of the “employeeDB” database was underway, again names would have to be changed or separate servers used. Workarounds such as temporarily renaming a database for backup or test purposes are possible, but they are risky and time-consuming. Likewise, in some cases, a certain version of a DBMS software (e.g., Oracle version 1) may not be able to run concurrently with a different version (e.g., Oracle version 2) on the same server, because of similar clashing namespace limitations at the software level, e.g., names of executable, libraries, configuration files, locking mechanisms, logs, etc., which are designed and provided by the manufacturer. The result again is that multiple servers are needed in such traditional systems to enable concurrent and overlapping operations to occur within the namespace limits of each server. This multi-server solution is expensive and adds substantial complexity, risk, and maintenance costs.

By using the illustrative enhancements described herein in conjunction with software containerization techniques in a data storage management system, a single proxy server can be dynamically configured as needed to perform any number of concurrent and/or overlapping storage and/or testing operations relative to one or more DBMSs in a data network. Illustratively, enhanced storage management components, e.g., storage manager, data agents, media agents, and a specially configured proxy server, interoperate to enable concurrent and/or overlapping operations that are not encumbered by namespace restrictions. By using software containers that operate independently of each other on the same proxy server, storage operations and/or testing can be executed in each respective software container without regard to what other software containers are doing. Moreover, all the container-based operations on the proxy server occur without involving any of the DBMS production servers that use and generate “live” data, such as database data. Thus, the illustrative proxy server and the techniques associated with it insulate the DBMS production environment from the testing and storage operations hosted by the proxy server.

For example, according to an illustrative embodiment, the same DBMS software (e.g., Oracle version 1.1) can be instantiated in several respective concurrent software containers on the proxy server to perform operations such as a backup of a first database data source in a first software container, a backup of a later point-in-time copy of the same database data source in a second software container, and a test run of a previously backed up copy of the database in a third software container. In another example, the test run can use a newer version of the DBMS software (e.g., Oracle version 1.2) to check whether older copies of database data are compatible with the newer DBMS software, all the while continuing to perform storage operations (e.g., backup, archive, restore, etc.) in other software containers using the newer DBMS software. In other examples, containerized test runs can check whether a DBMS software version and/or backup copy of a database work properly with a certain target operating system that differs from the one operating when the backup copy was originally made. Likewise, containerized test runs can be used for comparison purposes, for example to compare how long a storage operation takes with a newer version of a storage management component (e.g., data agent, media agent, storage manager) versus an older version. Other similar performance concurrency and analysis exercises can be envisioned in any combination and permutation by using software containers according to the illustrative embodiment.

To support these scenarios, an illustrative data storage management system relies on a specially configured proxy server, illustratively using proxy control logic for a variety of functions, including for operating the software containers on the proxy server, for maintaining certain resources needed by the software containers, and for interworking with other components of the data storage management system, such as the storage manager, primary and secondary data storage devices, index server(s), report server(s), and client computing devices. Illustratively, a catalog service that runs on the proxy server comprises maintenance rules, maintains a software cache according to the rules, and also maintains an associated cache catalog on the proxy server. The software containers are generally managed and operated by an illustrative container manager also hosted by the proxy server.

The illustrative software cache comprises contents that are resources needed by the software containers, such as pre-configured container templates, DBMS software components (e.g., executable files, library files, configuration files, etc.), so-called lightervisors representing target operating systems, and storage management software executables (e.g., data agents, media agents) for performing test and storage operations. The maintenance rules in the catalog service govern when cache contents should be purged, such as by moving them offline into archive copies in secondary storage from where they could be retrieved when needed, e.g., archiving an older version of DBMS software or storage management software that is only rarely used. The illustrative cache catalog comprises an index of the contents of the software cache, including a record of whether cache contents are fully present in the software cache or have been archived and are represented only by a corresponding stub, and also tracks when each content element was last used in a software container. The cache catalogue is kept current by the illustrative catalog service entering updates therein whenever a software cache content element is used and/or added and/or archived. The illustrative catalog service also reports cache catalog changes to an index server that illustratively operates in the data storage management system and which comprises diverse indexed information collected from sources throughout the data storage management system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1A is a block diagram illustrating an exemplary information management system.

FIG. 1B is a detailed view of a primary storage device, a secondary storage device, and some examples of primary data and secondary copy data.

FIG. 1C is a block diagram of an exemplary information management system including a storage manager, one or more data agents, and one or more media agents.

FIG. 1D is a block diagram illustrating a scalable information management system.

FIG. 1E illustrates certain secondary copy operations according to an exemplary storage policy.

FIGS. 1F-1H are block diagrams illustrating suitable data structures that may be employed by the information management system.

FIG. 2A illustrates a system and technique for synchronizing primary data to a destination such as a failover site using secondary copy data.

FIG. 2B illustrates an information management system architecture incorporating use of a network file system (NFS) protocol for communicating between the primary and secondary storage subsystems.

FIG. 2C is a block diagram of an example of a highly scalable managed data pool architecture.

FIG. 3 is a block diagram depicting an illustrative system 300 for using software containerization to dynamically configure a proxy server for concurrent and/or overlapping backup, restore, and/or test operations for database management systems (DBMS), according to an illustrative embodiment of the present invention.

FIG. 4 is a block diagram depicting further detail of certain components of system 300.

FIG. 5A is a block diagram depicting further detail of certain components of system 300, including proxy control logic 324.

FIG. 5B is a block diagram depicting further detail of certain components of system 300, including an illustrative software container 323, as well as certain data movement operations using a snapshot clone as a data source for generating and storing a secondary copy.

FIG. 6 depicts some salient operations of a method 600 according to an illustrative embodiment of the present invention.

FIG. 7 depicts some salient operations of block 660 in method 600.

FIG. 8 depicts some salient operations of block 670 in method 600.

FIG. 9 depicts some salient operations of block 706 in method 600.

FIG. 10 depicts some salient operations of block 708 in method 600.

FIG. 11 depicts some salient operations of block 804 in method 600.

FIG. 12 depicts some salient operations of block 810 in method 600.

DETAILED DESCRIPTION

Detailed descriptions and examples of systems and methods according to one or more illustrative embodiments of the present invention may be found in the section entitled DYNAMICALLY CONFIGURING A PROXY SERVER USING SOFTWARE-CONTAINERIZATION FOR CONCURRENT AND/OR OVERLAPPING BACKUP, RESTORE, AND/OR TEST OPERATIONS, as well as in the section entitled Example Embodiments, and also in FIGS. 3-12 herein. Furthermore, components and functionality for dynamically configuring a proxy server using containerization for concurrent and/or overlapping backup, restore, and/or test operations may be configured and/or incorporated into information management systems such as those described herein in FIGS. 1A-1H and 2A-2C.

Various embodiments described herein are intimately tied to, enabled by, and would not exist except for, computer technology. For example, dynamically configuring a proxy server using containerization for concurrent and/or overlapping backup, restore, and/or test operations described herein in reference to various embodiments, populating and maintaining a software cache on a proxy server to be used by the illustrative software containerization service cannot reasonably be performed by humans alone, without the computer technology upon which they are implemented.

Information Management System Overview

With the increasing importance of protecting and leveraging data, organizations simply cannot risk losing critical data. Moreover, runaway data growth and other modern realities make protecting and managing data increasingly difficult. There is therefore a need for efficient, powerful, and user-friendly solutions for protecting and managing data and for smart and efficient management of data storage. Depending on the size of the organization, there may be many data production sources which are under the purview of tens, hundreds, or even thousands of individuals. In the past, individuals were sometimes responsible for managing and protecting their own data, and a patchwork of hardware and software point solutions may have been used in any given organization. These solutions were often provided by different vendors and had limited or no interoperability. Certain embodiments described herein address these and other shortcomings of prior approaches by implementing scalable, unified, organization-wide information management, including data storage management.

FIG. 1A shows one such information management system 100 (or “system 100”), which generally includes combinations of hardware and software configured to protect and manage data and metadata that are generated and used by computing devices in system 100. System 100 may be referred to in some embodiments as a “storage management system” or a “data storage management system.” System 100 performs information management operations, some of which may be referred to as “storage operations” or “data storage operations,” to protect and manage the data residing in and/or managed by system 100. The organization that employs system 100 may be a corporation or other business entity, non-profit organization, educational institution, household, governmental agency, or the like.

Generally, the systems and associated components described herein may be compatible with and/or provide some or all of the functionality of the systems and corresponding components described in one or more of the following U.S. patents/publications and patent applications assigned to Commvault Systems, Inc., each of which is hereby incorporated by reference in its entirety herein:

-   -   U.S. Pat. No. 7,035,880, entitled “Modular Backup and Retrieval         System Used in Conjunction With a Storage Area Network”;     -   U.S. Pat. No. 7,107,298, entitled “System And Method For         Archiving Objects In An Information Store”;     -   U.S. Pat. No. 7,246,207, entitled “System and Method for         Dynamically Performing Storage Operations in a Computer         Network”;     -   U.S. Pat. No. 7,315,923, entitled “System And Method For         Combining Data Streams In Pipelined Storage Operations In A         Storage Network”;     -   U.S. Pat. No. 7,343,453, entitled “Hierarchical Systems and         Methods for Providing a Unified View of Storage Information”;     -   U.S. Pat. No. 7,395,282, entitled “Hierarchical Backup and         Retrieval System”;     -   U.S. Pat. No. 7,529,782, entitled “System and Methods for         Performing a Snapshot and for Restoring Data”;     -   U.S. Pat. No. 7,617,262, entitled “System and Methods for         Monitoring Application Data in a Data Replication System”;     -   U.S. Pat. No. 7,734,669, entitled “Managing Copies Of Data”;     -   U.S. Pat. No. 7,747,579, entitled “Metabase for Facilitating         Data Classification”;     -   U.S. Pat. No. 8,156,086, entitled “Systems And Methods For         Stored Data Verification”;     -   U.S. Pat. No. 8,170,995, entitled “Method and System for Offline         Indexing of Content and Classifying Stored Data”;     -   U.S. Pat. No. 8,230,195, entitled “System And Method For         Performing Auxiliary Storage Operations”;     -   U.S. Pat. No. 8,285,681, entitled “Data Object Store and Server         for a Cloud Storage Environment, Including Data Deduplication         and Data Management Across Multiple Cloud Storage Sites”;     -   U.S. Pat. No. 8,307,177, entitled “Systems And Methods For         Management Of Virtualization Data”;     -   U.S. Pat. No. 8,364,652, entitled “Content-Aligned, Block-Based         Deduplication”;     -   U.S. Pat. No. 8,578,120, entitled “Block-Level Single         Instancing”;     -   U.S. Pat. No. 8,954,446, entitled “Client-Side Repository in a         Networked Deduplicated Storage System”;     -   U.S. Pat. No. 9,020,900, entitled “Distributed Deduplicated         Storage System”;     -   U.S. Pat. No. 9,098,495, entitled “Application-Aware and Remote         Single Instance Data Management”;     -   U.S. Pat. No. 9,239,687, entitled “Systems and Methods for         Retaining and Using Data Block Signatures in Data Protection         Operations”;     -   U.S. Pat. Pub. No. 2006/0224846, entitled “System and Method to         Support Single Instance Storage Operations”;     -   U.S. Pat. Pub. No. 2014/0201170, entitled “High Availability         Distributed Deduplicated Storage System”;     -   U.S. Pat. Pub. No. 2016/0041880 A1, entitled “Efficient         Application Recovery In An Information Management System Based         On Pseudo-Storage-Device Driver”;     -   U.S. Pat. Pub. No. 2016/0154709 A1, entitled “Point-In-Time         Backups Of A Production Application Made Accessible Over Fibre         Channel And/Or iSCSI As Data Sources To A Remote Application By         Representing The Backups As Pseudo-Disks Operating Apart From         The Production Application And Its Host”;     -   U.S. patent application Ser. No. 14/721,971, entitled         “Replication Using Deduplicated Secondary Copy Data” ;     -   U.S. Patent Application No. 62/265,339 entitled “Live         Synchronization and Management of Virtual Machines across         Computing and Virtualization Platforms and Using Live         Synchronization to Support Disaster Recovery”;     -   U.S. Patent Application No. 62/273,286 entitled “Redundant and         Robust Distributed Deduplication Data Storage System”;     -   U.S. Patent Application No. 62/294,920, entitled “Data         Protection Operations Based on Network Path Information”;     -   U.S. Patent Application No. 62/297,057, entitled “Data         Restoration Operations Based on Network Path Information”; and     -   U.S. Patent Application No. 62/387,384, entitled         “Application-Level Live Synchronization Across Computing         Platforms Including Synchronizing Co-Resident Applications To         Disparate Standby Destinations And Selectively Synchronizing         Some Applications And Not Others”.

System 100 includes computing devices and computing technologies. For instance, system 100 can include one or more client computing devices 102 and secondary storage computing devices 106, as well as storage manager 140 or a host computing device for it. Computing devices can include, without limitation, one or more: workstations, personal computers, desktop computers, or other types of generally fixed computing systems such as mainframe computers, servers, and minicomputers. Other computing devices can include mobile or portable computing devices, such as one or more laptops, tablet computers, personal data assistants, mobile phones (such as smartphones), and other mobile or portable computing devices such as embedded computers, set top boxes, vehicle-mounted devices, wearable computers, etc. Servers can include mail servers, file servers, database servers, virtual machine servers, and web servers. Any given computing device comprises one or more processors (e.g., CPU and/or single-core or multi-core processors), as well as corresponding non-transitory computer memory (e.g., random-access memory (RAM)) for storing computer programs which are to be executed by the one or more processors. Other computer memory for mass storage of data may be packaged/configured with the computing device (e.g., an internal hard disk) and/or may be external and accessible by the computing device (e.g., network-attached storage, a storage array, etc.). In some cases, a computing device includes cloud computing resources, which may be implemented as virtual machines. For instance, one or more virtual machines may be provided to the organization by a third-party cloud service vendor.

In some embodiments, computing devices can include one or more virtual machine(s) running on a physical host computing device (or “host machine”) operated by the organization. As one example, the organization may use one virtual machine as a database server and another virtual machine as a mail server, both virtual machines operating on the same host machine. A Virtual machine (“VM”) is a software implementation of a computer that does not physically exist and is instead instantiated in an operating system of a physical computer (or host machine) to enable applications to execute within the VM's environment, i.e., a VM emulates a physical computer. A VM includes an operating system and associated virtual resources, such as computer memory and processor(s). A hypervisor operates between the VM and the hardware of the physical host machine and is generally responsible for creating and running the VMs. Hypervisors are also known in the art as virtual machine monitors or a virtual machine managers or “VMMs”, and may be implemented in software, firmware, and/or specialized hardware installed on the host machine. Examples of hypervisors include ESX Server, by VMware, Inc. of Palo Alto, Calif.; Microsoft Virtual Server and Microsoft Windows Server Hyper-V, both by Microsoft Corporation of Redmond, Wash.; Sun xVM by Oracle America Inc. of Santa Clara, Calif.; and Xen by Citrix Systems, Santa Clara, Calif. The hypervisor provides resources to each virtual operating system such as a virtual processor, virtual memory, a virtual network device, and a virtual disk. Each virtual machine has one or more associated virtual disks. The hypervisor typically stores the data of virtual disks in files on the file system of the physical host machine, called virtual machine disk files (“VMDK” in VMware lingo) or virtual hard disk image files (in Microsoft lingo). For example, VMware's ESX Server provides the Virtual Machine File System (VMFS) for the storage of virtual machine disk files. A virtual machine reads data from and writes data to its virtual disk much the way that a physical machine reads data from and writes data to a physical disk. Examples of techniques for implementing information management in a cloud computing environment are described in U.S. Pat. No. 8,285,681. Examples of techniques for implementing information management in a virtualized computing environment are described in U.S. Pat. No. 8,307,177.

Information management system 100 can also include electronic data storage devices, generally used for mass storage of data, including, e.g., primary storage devices 104 and secondary storage devices 108. Storage devices can generally be of any suitable type including, without limitation, disk drives, storage arrays (e.g., storage-area network (SAN) and/or network-attached storage (NAS) technology), semiconductor memory (e.g., solid state storage devices), network attached storage (NAS) devices, tape libraries, or other magnetic, non-tape storage devices, optical media storage devices, DNA/RNA-based memory technology, combinations of the same, etc. In some embodiments, storage devices form part of a distributed file system. In some cases, storage devices are provided in a cloud storage environment (e.g., a private cloud or one operated by a third-party vendor), whether for primary data or secondary copies or both.

Depending on context, the term “information management system” can refer to generally all of the illustrated hardware and software components in FIG. 1C, or the term may refer to only a subset of the illustrated components. For instance, in some cases, system 100 generally refers to a combination of specialized components used to protect, move, manage, manipulate, analyze, and/or process data and metadata generated by client computing devices 102. However, system 100 in some cases does not include the underlying components that generate and/or store primary data 112, such as the client computing devices 102 themselves, and the primary storage devices 104. Likewise secondary storage devices 108 (e.g., a third-party provided cloud storage environment) may not be part of system 100. As an example, “information management system” or “storage management system” may sometimes refer to one or more of the following components, which will be described in further detail below: storage manager, data agent, and media agent.

One or more client computing devices 102 may be part of system 100, each client computing device 102 having an operating system and at least one application 110 and one or more accompanying data agents executing thereon; and associated with one or more primary storage devices 104 storing primary data 112. Client computing device(s) 102 and primary storage devices 104 may generally be referred to in some cases as primary storage subsystem 117.

Client Computing Devices, Clients, and Subclients

Typically, a variety of sources in an organization produce data to be protected and managed. As just one illustrative example, in a corporate environment such data sources can be employee workstations and company servers such as a mail server, a web server, a database server, a transaction server, or the like. In system 100, data generation sources include one or more client computing devices 102. A computing device that has a data agent 142 installed and operating on it is generally referred to as a “client computing device” 102, and may include any type of computing device, without limitation. A client computing device 102 may be associated with one or more users and/or user accounts.

A “client” is a logical component of information management system 100, which may represent a logical grouping of one or more data agents installed on a client computing device 102. Storage manager 140 recognizes a client as a component of system 100, and in some embodiments, may automatically create a client component the first time a data agent 142 is installed on a client computing device 102. Because data generated by executable component(s) 110 is tracked by the associated data agent 142 so that it may be properly protected in system 100, a client may be said to generate data and to store the generated data to primary storage, such as primary storage device 104. However, the terms “client” and “client computing device” as used herein do not imply that a client computing device 102 is necessarily configured in the client/server sense relative to another computing device such as a mail server, or that a client computing device 102 cannot be a server in its own right. As just a few examples, a client computing device 102 can be and/or include mail servers, file servers, database servers, virtual machine servers, and/or web servers.

Each client computing device 102 may have application(s) 110 executing thereon which generate and manipulate the data that is to be protected from loss and managed in system 100. Applications 110 generally facilitate the operations of an organization, and can include, without limitation, mail server applications (e.g., Microsoft Exchange Server), file system applications, mail client applications (e.g., Microsoft Exchange Client), database applications or database management systems (e.g., SQL, Oracle, SAP, Lotus Notes Database), word processing applications (e.g., Microsoft Word), spreadsheet applications, financial applications, presentation applications, graphics and/or video applications, browser applications, mobile applications, entertainment applications, and so on. Each application 110 may be accompanied by an application-specific data agent 142, though not all data agents 142 are application-specific or associated with only application. A file system, e.g., Microsoft Windows Explorer, may be considered an application 110 and may be accompanied by its own data agent 142. Client computing devices 102 can have at least one operating system (e.g., Microsoft Windows, Mac OS X, iOS, IBM z/OS, Linux, other Unix-based operating systems, etc.) installed thereon, which may support or host one or more file systems and other applications 110. In some embodiments, a virtual machine that executes on a host client computing device 102 may be considered an application 110 and may be accompanied by a specific data agent 142 (e.g., virtual server data agent).

Client computing devices 102 and other components in system 100 can be connected to one another via one or more electronic communication pathways 114. For example, a first communication pathway 114 may communicatively couple client computing device 102 and secondary storage computing device 106; a second communication pathway 114 may communicatively couple storage manager 140 and client computing device 102; and a third communication pathway 114 may communicatively couple storage manager 140 and secondary storage computing device 106, etc. (see, e.g., FIG. 1A and FIG. 1C). A communication pathway 114 can include one or more networks or other connection types including one or more of the following, without limitation: the Internet, a wide area network (WAN), a local area network (LAN), a Storage Area Network (SAN), a Fibre Channel (FC) connection, a Small Computer System Interface (SCSI) connection, a virtual private network (VPN), a token ring or TCP/IP based network, an intranet network, a point-to-point link, a cellular network, a wireless data transmission system, a two-way cable system, an interactive kiosk network, a satellite network, a broadband network, a baseband network, a neural network, a mesh network, an ad hoc network, other appropriate computer or telecommunications networks, combinations of the same or the like. Communication pathways 114 in some cases may also include application programming interfaces (APIs) including, e.g., cloud service provider APIs, virtual machine management APIs, and hosted service provider APIs. The underlying infrastructure of communication pathways 114 may be wired and/or wireless, analog and/or digital, or any combination thereof; and the facilities used may be private, public, third-party provided, or any combination thereof, without limitation.

A “subclient” is a logical grouping of all or part of a client's primary data 112. In general, a subclient may be defined according to how the subclient data is to be protected as a unit in system 100. For example, a subclient may be associated with a certain storage policy. A given client may thus comprise several subclients, each subclient associated with a different storage policy. For example, some files may form a first subclient that requires compression and deduplication and is associated with a first storage policy. Other files of the client may form a second subclient that requires a different retention schedule as well as encryption, and may be associated with a different, second storage policy. As a result, though the primary data may be generated by the same application 110 and may belong to one given client, portions of the data may be assigned to different subclients for distinct treatment by system 100. More detail on subclients is given in regard to storage policies below.

Primary Data and Exemplary Primary Storage Devices

Primary data 112 is generally production data or “live” data generated by the operating system and/or applications 110 executing on client computing device 102. Primary data 112 is generally stored on primary storage device(s) 104 and is organized via a file system operating on the client computing device 102. Thus, client computing device(s) 102 and corresponding applications 110 may create, access, modify, write, delete, and otherwise use primary data 112. Primary data 112 is generally in the native format of the source application 110. Primary data 112 is an initial or first stored body of data generated by the source application 110. Primary data 112 in some cases is created substantially directly from data generated by the corresponding source application 110. It can be useful in performing certain tasks to organize primary data 112 into units of different granularities. In general, primary data 112 can include files, directories, file system volumes, data blocks, extents, or any other hierarchies or organizations of data objects. As used herein, a “data object” can refer to (i) any file that is currently addressable by a file system or that was previously addressable by the file system (e.g., an archive file), and/or to (ii) a subset of such a file (e.g., a data block, an extent, etc.). Primary data 112 may include structured data (e.g., database files), unstructured data (e.g., documents), and/or semi-structured data. See, e.g., FIG. 1B.

It can also be useful in performing certain functions of system 100 to access and modify metadata within primary data 112. Metadata generally includes information about data objects and/or characteristics associated with the data objects. For simplicity herein, it is to be understood that, unless expressly stated otherwise, any reference to primary data 112 generally also includes its associated metadata, but references to metadata generally do not include the primary data. Metadata can include, without limitation, one or more of the following: the data owner (e.g., the client or user that generates the data), the last modified time (e.g., the time of the most recent modification of the data object), a data object name (e.g., a file name), a data object size (e.g., a number of bytes of data), information about the content (e.g., an indication as to the existence of a particular search term), user-supplied tags, to/from information for email (e.g., an email sender, recipient, etc.), creation date, file type (e.g., format or application type), last accessed time, application type (e.g., type of application that generated the data object), location/network (e.g., a current, past or future location of the data object and network pathways to/from the data object), geographic location (e.g., GPS coordinates), frequency of change (e.g., a period in which the data object is modified), business unit (e.g., a group or department that generates, manages or is otherwise associated with the data object), aging information (e.g., a schedule, such as a time period, in which the data object is migrated to secondary or long term storage), boot sectors, partition layouts, file location within a file folder directory structure, user permissions, owners, groups, access control lists (ACLs), system metadata (e.g., registry information), combinations of the same or other similar information related to the data object. In addition to metadata generated by or related to file systems and operating systems, some applications 110 and/or other components of system 100 maintain indices of metadata for data objects, e.g., metadata associated with individual email messages. The use of metadata to perform classification and other functions is described in greater detail below.

Primary storage devices 104 storing primary data 112 may be relatively fast and/or expensive technology (e.g., flash storage, a disk drive, a hard-disk storage array, solid state memory, etc.), typically to support high-performance live production environments. Primary data 112 may be highly changeable and/or may be intended for relatively short term retention (e.g., hours, days, or weeks). According to some embodiments, client computing device 102 can access primary data 112 stored in primary storage device 104 by making conventional file system calls via the operating system. Each client computing device 102 is generally associated with and/or in communication with one or more primary storage devices 104 storing corresponding primary data 112. A client computing device 102 is said to be associated with or in communication with a particular primary storage device 104 if it is capable of one or more of: routing and/or storing data (e.g., primary data 112) to the primary storage device 104, coordinating the routing and/or storing of data to the primary storage device 104, retrieving data from the primary storage device 104, coordinating the retrieval of data from the primary storage device 104, and modifying and/or deleting data in the primary storage device 104. Thus, a client computing device 102 may be said to access data stored in an associated storage device 104.

Primary storage device 104 may be dedicated or shared. In some cases, each primary storage device 104 is dedicated to an associated client computing device 102, e.g., a local disk drive. In other cases, one or more primary storage devices 104 can be shared by multiple client computing devices 102, e.g., via a local network, in a cloud storage implementation, etc. As one example, primary storage device 104 can be a storage array shared by a group of client computing devices 102, such as EMC Clariion, EMC Symmetrix, EMC Celerra, Dell EqualLogic, IBM XIV, NetApp FAS, HP EVA, and HP 3PAR.

System 100 may also include hosted services (not shown), which may be hosted in some cases by an entity other than the organization that employs the other components of system 100. For instance, the hosted services may be provided by online service providers. Such service providers can provide social networking services, hosted email services, or hosted productivity applications or other hosted applications such as software-as-a-service (SaaS), platform-as-a-service (PaaS), application service providers (ASPs), cloud services, or other mechanisms for delivering functionality via a network. As it services users, each hosted service may generate additional data and metadata, which may be managed by system 100, e.g., as primary data 112. In some cases, the hosted services may be accessed using one of the applications 110. As an example, a hosted mail service may be accessed via browser running on a client computing device 102.

Secondary Copies and Exemplary Secondary Storage Devices

Primary data 112 stored on primary storage devices 104 may be compromised in some cases, such as when an employee deliberately or accidentally deletes or overwrites primary data 112. Or primary storage devices 104 can be damaged, lost, or otherwise corrupted. For recovery and/or regulatory compliance purposes, it is therefore useful to generate and maintain copies of primary data 112. Accordingly, system 100 includes one or more secondary storage computing devices 106 and one or more secondary storage devices 108 configured to create and store one or more secondary copies 116 of primary data 112 including its associated metadata. The secondary storage computing devices 106 and the secondary storage devices 108 may be referred to as secondary storage subsystem 118.

Secondary copies 116 can help in search and analysis efforts and meet other information management goals as well, such as: restoring data and/or metadata if an original version is lost (e.g., by deletion, corruption, or disaster); allowing point-in-time recovery; complying with regulatory data retention and electronic discovery (e-discovery) requirements; reducing utilized storage capacity in the production system and/or in secondary storage; facilitating organization and search of data; improving user access to data files across multiple computing devices and/or hosted services; and implementing data retention and pruning policies.

A secondary copy 116 can comprise a separate stored copy of data that is derived from one or more earlier-created stored copies (e.g., derived from primary data 112 or from another secondary copy 116). Secondary copies 116 can include point-in-time data, and may be intended for relatively long-term retention before some or all of the data is moved to other storage or discarded. In some cases, a secondary copy 116 may be in a different storage device than other previously stored copies; and/or may be remote from other previously stored copies. Secondary copies 116 can be stored in the same storage device as primary data 112. For example, a disk array capable of performing hardware snapshots stores primary data 112 and creates and stores hardware snapshots of the primary data 112 as secondary copies 116. Secondary copies 116 may be stored in relatively slow and/or lower cost storage (e.g., magnetic tape). A secondary copy 116 may be stored in a backup or archive format, or in some other format different from the native source application format or other format of primary data 112.

Secondary storage computing devices 106 may index secondary copies 116 (e.g., using a media agent 144), enabling users to browse and restore at a later time and further enabling the lifecycle management of the indexed data. After creation of a secondary copy 116 that represents certain primary data 112, a pointer or other location indicia (e.g., a stub) may be placed in primary data 112, or be otherwise associated with primary data 112, to indicate the current location of a particular secondary copy 116. Since an instance of a data object or metadata in primary data 112 may change over time as it is modified by application 110 (or hosted service or the operating system), system 100 may create and manage multiple secondary copies 116 of a particular data object or metadata, each copy representing the state of the data object in primary data 112 at a particular point in time. Moreover, since an instance of a data object in primary data 112 may eventually be deleted from primary storage device 104 and the file system, system 100 may continue to manage point-in-time representations of that data object, even though the instance in primary data 112 no longer exists. For virtual machines, the operating system and other applications 110 of client computing device(s) 102 may execute within or under the management of virtualization software (e.g., a VMM), and the primary storage device(s) 104 may comprise a virtual disk created on a physical storage device. System 100 may create secondary copies 116 of the files or other data objects in a virtual disk file and/or secondary copies 116 of the entire virtual disk file itself (e.g., of an entire .vmdk file).

Secondary copies 116 are distinguishable from corresponding primary data 112. First, secondary copies 116 can be stored in a different format from primary data 112 (e.g., backup, archive, or other non-native format). For this or other reasons, secondary copies 116 may not be directly usable by applications 110 or client computing device 102 (e.g., via standard system calls or otherwise) without modification, processing, or other intervention by system 100 which may be referred to as “restore” operations. Secondary copies 116 may have been processed by data agent 142 and/or media agent 144 in the course of being created (e.g., compression, deduplication, encryption, integrity markers, indexing, formatting, application-aware metadata, etc.), and thus secondary copy 116 may represent source primary data 112 without necessarily being exactly identical to the source.

Second, secondary copies 116 may be stored on a secondary storage device 108 that is inaccessible to application 110 running on client computing device 102 and/or hosted service. Some secondary copies 116 may be “offline copies,” in that they are not readily available (e.g., not mounted to tape or disk). Offline copies can include copies of data that system 100 can access without human intervention (e.g., tapes within an automated tape library, but not yet mounted in a drive), and copies that the system 100 can access only with some human intervention (e.g., tapes located at an offsite storage site).

Using Intermediate Devices for Creating Secondary Copies—Secondary Storage Computing Devices

Creating secondary copies can be challenging when hundreds or thousands of client computing devices 102 continually generate large volumes of primary data 112 to be protected. Also, there can be significant overhead involved in the creation of secondary copies 116. Moreover, specialized programmed intelligence and/or hardware capability is generally needed for accessing and interacting with secondary storage devices 108. Client computing devices 102 may interact directly with a secondary storage device 108 to create secondary copies 116, but in view of the factors described above, this approach can negatively impact the ability of client computing device 102 to serve/service application 110 and produce primary data 112. Further, any given client computing device 102 may not be optimized for interaction with certain secondary storage devices 108.

Thus, system 100 may include one or more software and/or hardware components which generally act as intermediaries between client computing devices 102 (that generate primary data 112) and secondary storage devices 108 (that store secondary copies 116). In addition to off-loading certain responsibilities from client computing devices 102, these intermediate components provide other benefits. For instance, as discussed further below with respect to FIG. 1D, distributing some of the work involved in creating secondary copies 116 can enhance scalability and improve system performance. For instance, using specialized secondary storage computing devices 106 and media agents 144 for interfacing with secondary storage devices 108 and/or for performing certain data processing operations can greatly improve the speed with which system 100 performs information management operations and can also improve the capacity of the system to handle large numbers of such operations, while reducing the computational load on the production environment of client computing devices 102. The intermediate components can include one or more secondary storage computing devices 106 as shown in FIG. 1A and/or one or more media agents 144. Media agents are discussed further below (e.g., with respect to FIGS. 1C-1E). These special-purpose components of system 100 comprise specialized programmed intelligence and/or hardware capability for writing to, reading from, instructing, communicating with, or otherwise interacting with secondary storage devices 108.

Secondary storage computing device(s) 106 can comprise any of the computing devices described above, without limitation. In some cases, secondary storage computing device(s) 106 also include specialized hardware componentry and/or software intelligence (e.g., specialized interfaces) for interacting with certain secondary storage device(s) 108 with which they may be specially associated.

To create a secondary copy 116 involving the copying of data from primary storage subsystem 117 to secondary storage subsystem 118, client computing device 102 may communicate the primary data 112 to be copied (or a processed version thereof generated by a data agent 142) to the designated secondary storage computing device 106, via a communication pathway 114. Secondary storage computing device 106 in turn may further process and convey the data or a processed version thereof to secondary storage device 108. One or more secondary copies 116 may be created from existing secondary copies 116, such as in the case of an auxiliary copy operation, described further below.

Exemplary Primary Data and an Exemplary Secondary Copy

FIG. 1B is a detailed view of some specific examples of primary data stored on primary storage device(s) 104 and secondary copy data stored on secondary storage device(s) 108, with other components of the system removed for the purposes of illustration. Stored on primary storage device(s) 104 are primary data 112 objects including word processing documents 119A-B, spreadsheets 120, presentation documents 122, video files 124, image files 126, email mailboxes 128 (and corresponding email messages 129A-C), HTML/XML or other types of markup language files 130, databases 132 and corresponding tables or other data structures 133A-133C. Some or all primary data 112 objects are associated with corresponding metadata (e.g., “Meta1-11”), which may include file system metadata and/or application-specific metadata. Stored on the secondary storage device(s) 108 are secondary copy 116 data objects 134A-C which may include copies of or may otherwise represent corresponding primary data 112.

Secondary copy data objects 134A-C can individually represent more than one primary data object. For example, secondary copy data object 134A represents three separate primary data objects 133C, 122, and 129C (represented as 133C′, 122′, and 129C′, respectively, and accompanied by corresponding metadata Meta11, Meta3, and Meta8, respectively). Moreover, as indicated by the prime mark (′), secondary storage computing devices 106 or other components in secondary storage subsystem 118 may process the data received from primary storage subsystem 117 and store a secondary copy including a transformed and/or supplemented representation of a primary data object and/or metadata that is different from the original format, e.g., in a compressed, encrypted, deduplicated, or other modified format. For instance, secondary storage computing devices 106 can generate new metadata or other information based on said processing, and store the newly generated information along with the secondary copies. Secondary copy data object 134B represents primary data objects 120, 1336, and 119A as 120′, 1336′, and 119A′, respectively, accompanied by corresponding metadata Meta2, Meta10, and Meta1, respectively. Also, secondary copy data object 134C represents primary data objects 133A, 1196, and 129A as 133A′, 1196′, and 129A′, respectively, accompanied by corresponding metadata Meta9, Meta5, and Meta6, respectively.

Exemplary Information Management System Architecture

System 100 can incorporate a variety of different hardware and software components, which can in turn be organized with respect to one another in many different configurations, depending on the embodiment. There are critical design choices involved in specifying the functional responsibilities of the components and the role of each component in system 100. Such design choices can impact how system 100 performs and adapts to data growth and other changing circumstances. FIG. 1C shows a system 100 designed according to these considerations and includes: storage manager 140, one or more data agents 142 executing on client computing device(s) 102 and configured to process primary data 112, and one or more media agents 144 executing on one or more secondary storage computing devices 106 for performing tasks involving secondary storage devices 108.

Storage Manager

Storage manager 140 is a centralized storage and/or information manager that is configured to perform certain control functions and also to store certain critical information about system 100—hence storage manager 140 is said to manage system 100. As noted, the number of components in system 100 and the amount of data under management can be large. Managing the components and data is therefore a significant task, which can grow unpredictably as the number of components and data scale to meet the needs of the organization. For these and other reasons, according to certain embodiments, responsibility for controlling system 100, or at least a significant portion of that responsibility, is allocated to storage manager 140. Storage manager 140 can be adapted independently according to changing circumstances, without having to replace or re-design the remainder of the system. Moreover, a computing device for hosting and/or operating as storage manager 140 can be selected to best suit the functions and networking needs of storage manager 140. These and other advantages are described in further detail below and with respect to FIG. 1D.

Storage manager 140 may be a software module or other application hosted by a suitable computing device. In some embodiments, storage manager 140 is itself a computing device that performs the functions described herein. Storage manager 140 comprises or operates in conjunction with one or more associated data structures such as a dedicated database (e.g., management database 146), depending on the configuration. The storage manager 140 generally initiates, performs, coordinates, and/or controls storage and other information management operations performed by system 100, e.g., to protect and control primary data 112 and secondary copies 116. In general, storage manager 140 is said to manage system 100, which includes communicating with, instructing, and controlling in some circumstances components such as data agents 142 and media agents 144, etc.

As shown by the dashed arrowed lines 114 in FIG. 1C, storage manager 140 may communicate with, instruct, and/or control some or all elements of system 100, such as data agents 142 and media agents 144. In this manner, storage manager 140 manages the operation of various hardware and software components in system 100. In certain embodiments, control information originates from storage manager 140 and status as well as index reporting is transmitted to storage manager 140 by the managed components, whereas payload data and metadata are generally communicated between data agents 142 and media agents 144 (or otherwise between client computing device(s) 102 and secondary storage computing device(s) 106), e.g., at the direction of and under the management of storage manager 140. Control information can generally include parameters and instructions for carrying out information management operations, such as, without limitation, instructions to perform a task associated with an operation, timing information specifying when to initiate a task, data path information specifying what components to communicate with or access in carrying out an operation, and the like. In other embodiments, some information management operations are controlled or initiated by other components of system 100 (e.g., by media agents 144 or data agents 142), instead of or in combination with storage manager 140.

According to certain embodiments, storage manager 140 provides one or more of the following functions:

-   -   communicating with data agents 142 and media agents 144,         including transmitting instructions, messages, and/or queries,         as well as receiving status reports, index information,         messages, and/or queries, and responding to same;     -   initiating execution of information management operations;     -   initiating restore and recovery operations;     -   managing secondary storage devices 108 and inventory/capacity of         the same;     -   allocating secondary storage devices 108 for secondary copy         operations;     -   reporting, searching, and/or classification of data in system         100;     -   monitoring completion of and status reporting related to         information management operations and jobs;     -   tracking movement of data within system 100;     -   tracking age information relating to secondary copies 116,         secondary storage devices 108, comparing the age information         against retention guidelines, and initiating data pruning when         appropriate;     -   tracking logical associations between components in system 100;     -   protecting metadata associated with system 100, e.g., in         management database 146;     -   implementing job management, schedule management, event         management, alert management, reporting, job history         maintenance, user security management, disaster recovery         management, and/or user interfacing for system administrators         and/or end users of system 100;     -   sending, searching, and/or viewing of log files; and     -   implementing operations management functionality.

Storage manager 140 may maintain an associated database 146 (or “storage manager database 146” or “management database 146”) of management-related data and information management policies 148. Database 146 is stored in computer memory accessible by storage manager 140. Database 146 may include a management index 150 (or “index 150”) or other data structure(s) that may store: logical associations between components of the system; user preferences and/or profiles (e.g., preferences regarding encryption, compression, or deduplication of primary data or secondary copies; preferences regarding the scheduling, type, or other aspects of secondary copy or other operations; mappings of particular information management users or user accounts to certain computing devices or other components, etc.; management tasks; media containerization; other useful data; and/or any combination thereof. For example, storage manager 140 may use index 150 to track logical associations between media agents 144 and secondary storage devices 108 and/or movement of data to/from secondary storage devices 108. For instance, index 150 may store data associating a client computing device 102 with a particular media agent 144 and/or secondary storage device 108, as specified in an information management policy 148.

Administrators and others may configure and initiate certain information management operations on an individual basis. But while this may be acceptable for some recovery operations or other infrequent tasks, it is often not workable for implementing on-going organization-wide data protection and management. Thus, system 100 may utilize information management policies 148 for specifying and executing information management operations on an automated basis. Generally, an information management policy 148 can include a stored data structure or other information source that specifies parameters (e.g., criteria and rules) associated with storage management or other information management operations. Storage manager 140 can process an information management policy 148 and/or index 150 and, based on the results, identify an information management operation to perform, identify the appropriate components in system 100 to be involved in the operation (e.g., client computing devices 102 and corresponding data agents 142, secondary storage computing devices 106 and corresponding media agents 144, etc.), establish connections to those components and/or between those components, and/or instruct and control those components to carry out the operation. In this manner, system 100 can translate stored information into coordinated activity among the various computing devices in system 100.

Management database 146 may maintain information management policies 148 and associated data, although information management policies 148 can be stored in computer memory at any appropriate location outside management database 146. For instance, an information management policy 148 such as a storage policy may be stored as metadata in a media agent database 152 or in a secondary storage device 108 (e.g., as an archive copy) for use in restore or other information management operations, depending on the embodiment. Information management policies 148 are described further below. According to certain embodiments, management database 146 comprises a relational database (e.g., an SQL database) for tracking metadata, such as metadata associated with secondary copy operations (e.g., what client computing devices 102 and corresponding subclient data were protected and where the secondary copies are stored and which media agent 144 performed the storage operation(s)). This and other metadata may additionally be stored in other locations, such as at secondary storage computing device 106 or on the secondary storage device 108, allowing data recovery without the use of storage manager 140 in some cases. Thus, management database 146 may comprise data needed to kick off secondary copy operations (e.g., storage policies, schedule policies, etc.), status and reporting information about completed jobs (e.g., status and error reports on yesterday's backup jobs), and additional information sufficient to enable restore and disaster recovery operations (e.g., media agent associations, location indexing, content indexing, etc.).

Storage manager 140 may include a jobs agent 156, a user interface 158, and a management agent 154, all of which may be implemented as interconnected software modules or application programs. These are described further below.

Jobs agent 156 in some embodiments initiates, controls, and/or monitors the status of some or all information management operations previously performed, currently being performed, or scheduled to be performed by system 100. A job is a logical grouping of information management operations such as daily storage operations scheduled for a certain set of subclients (e.g., generating incremental block-level backup copies 116 at a certain time every day for database files in a certain geographical location). Thus, jobs agent 156 may access information management policies 148 (e.g., in management database 146) to determine when, where, and how to initiate/control jobs in system 100.

Storage Manager User Interfaces

User interface 158 may include information processing and display software, such as a graphical user interface (GUI), an application program interface (API), and/or other interactive interface(s) through which users and system processes can retrieve information about the status of information management operations or issue instructions to storage manager 140 and other components. Via user interface 158, users may issue instructions to the components in system 100 regarding performance of secondary copy and recovery operations. For example, a user may modify a schedule concerning the number of pending secondary copy operations. As another example, a user may employ the GUI to view the status of pending secondary copy jobs or to monitor the status of certain components in system 100 (e.g., the amount of capacity left in a storage device). Storage manager 140 may track information that permits it to select, designate, or otherwise identify content indices, deduplication databases, or similar databases or resources or data sets within its information management cell (or another cell) to be searched in response to certain queries. Such queries may be entered by the user by interacting with user interface 158.

Various embodiments of information management system 100 may be configured and/or designed to generate user interface data usable for rendering the various interactive user interfaces described. The user interface data may be used by system 100 and/or by another system, device, and/or software program (for example, a browser program), to render the interactive user interfaces. The interactive user interfaces may be displayed on, for example, electronic displays (including, for example, touch-enabled displays), consoles, etc., whether direct-connected to storage manager 140 or communicatively coupled remotely, e.g., via an internet connection. The present disclosure describes various embodiments of interactive and dynamic user interfaces, some of which may be generated by user interface agent 158, and which are the result of significant technological development. The user interfaces described herein may provide improved human-computer interactions, allowing for significant cognitive and ergonomic efficiencies and advantages over previous systems, including reduced mental workloads, improved decision-making, and the like. User interface 158 may operate in a single integrated view or console (not shown). The console may support a reporting capability for generating a variety of reports, which may be tailored to a particular aspect of information management.

User interfaces are not exclusive to storage manager 140 and in some embodiments a user may access information locally from a computing device component of system 100. For example, some information pertaining to installed data agents 142 and associated data streams may be available from client computing device 102. Likewise, some information pertaining to media agents 144 and associated data streams may be available from secondary storage computing device 106.

Storage Manager Management Agent

Management agent 154 can provide storage manager 140 with the ability to communicate with other components within system 100 and/or with other information management cells via network protocols and application programming interfaces (APIs) including, e.g., HTTP, HTTPS, FTP, REST, virtualization software APIs, cloud service provider APIs, and hosted service provider APIs, without limitation. Management agent 154 also allows multiple information management cells to communicate with one another. For example, system 100 in some cases may be one information management cell in a network of multiple cells adjacent to one another or otherwise logically related, e.g., in a WAN or LAN. With this arrangement, the cells may communicate with one another through respective management agents 154. Inter-cell communications and hierarchy is described in greater detail in e.g., U.S. Pat. No. 7,343,453.

Information Management Cell

An “information management cell” (or “storage operation cell” or “cell”) may generally include a logical and/or physical grouping of a combination of hardware and software components associated with performing information management operations on electronic data, typically one storage manager 140 and at least one data agent 142 (executing on a client computing device 102) and at least one media agent 144 (executing on a secondary storage computing device 106). For instance, the components shown in FIG. 1C may together form an information management cell. Thus, in some configurations, a system 100 may be referred to as an information management cell or a storage operation cell. A given cell may be identified by the identity of its storage manager 140, which is generally responsible for managing the cell.

Multiple cells may be organized hierarchically, so that cells may inherit properties from hierarchically superior cells or be controlled by other cells in the hierarchy (automatically or otherwise). Alternatively, in some embodiments, cells may inherit or otherwise be associated with information management policies, preferences, information management operational parameters, or other properties or characteristics according to their relative position in a hierarchy of cells. Cells may also be organized hierarchically according to function, geography, architectural considerations, or other factors useful or desirable in performing information management operations. For example, a first cell may represent a geographic segment of an enterprise, such as a Chicago office, and a second cell may represent a different geographic segment, such as a New York City office. Other cells may represent departments within a particular office, e.g., human resources, finance, engineering, etc. Where delineated by function, a first cell may perform one or more first types of information management operations (e.g., one or more first types of secondary copies at a certain frequency), and a second cell may perform one or more second types of information management operations (e.g., one or more second types of secondary copies at a different frequency and under different retention rules). In general, the hierarchical information is maintained by one or more storage managers 140 that manage the respective cells (e.g., in corresponding management database(s) 146).

Data Agents

A variety of different applications 110 can operate on a given client computing device 102, including operating systems, file systems, database applications, e-mail applications, and virtual machines, just to name a few. And, as part of the process of creating and restoring secondary copies 116, the client computing device 102 may be tasked with processing and preparing the primary data 112 generated by these various applications 110. Moreover, the nature of the processing/preparation can differ across application types, e.g., due to inherent structural, state, and formatting differences among applications 110 and/or the operating system of client computing device 102. Each data agent 142 is therefore advantageously configured in some embodiments to assist in the performance of information management operations based on the type of data that is being protected at a client-specific and/or application-specific level.

Data agent 142 is a component of information system 100 and is generally directed by storage manager 140 to participate in creating or restoring secondary copies 116. Data agent 142 may be a software program (e.g., in the form of a set of executable binary files) that executes on the same client computing device 102 as the associated application 110 that data agent 142 is configured to protect. Data agent 142 is generally responsible for managing, initiating, or otherwise assisting in the performance of information management operations in reference to its associated application(s) 110 and corresponding primary data 112 which is generated/accessed by the particular application(s) 110. For instance, data agent 142 may take part in copying, archiving, migrating, and/or replicating of certain primary data 112 stored in the primary storage device(s) 104. Data agent 142 may receive control information from storage manager 140, such as commands to transfer copies of data objects and/or metadata to one or more media agents 144. Data agent 142 also may compress, deduplicate, and encrypt certain primary data 112, as well as capture application-related metadata before transmitting the processed data to media agent 144. Data agent 142 also may receive instructions from storage manager 140 to restore (or assist in restoring) a secondary copy 116 from secondary storage device 108 to primary storage 104, such that the restored data may be properly accessed by application 110 in a suitable format as though it were primary data 112.

Each data agent 142 may be specialized for a particular application 110. For instance, different individual data agents 142 may be designed to handle Microsoft Exchange data, Lotus Notes data, Microsoft Windows file system data, Microsoft Active Directory Objects data, SQL Server data, SharePoint data, Oracle database data, SAP database data, virtual machines and/or associated data, and other types of data. A file system data agent, for example, may handle data files and/or other file system information. If a client computing device 102 has two or more types of data 112, a specialized data agent 142 may be used for each data type. For example, to backup, migrate, and/or restore all of the data on a Microsoft Exchange server, the client computing device 102 may use: (1) a Microsoft Exchange Mailbox data agent 142 to back up the Exchange mailboxes; (2) a Microsoft Exchange Database data agent 142 to back up the Exchange databases; (3) a Microsoft Exchange Public Folder data agent 142 to back up the Exchange Public Folders; and (4) a Microsoft Windows File System data agent 142 to back up the file system of client computing device 102. In this example, these specialized data agents 142 are treated as four separate data agents 142 even though they operate on the same client computing device 102. Other examples may include archive management data agents such as a migration archiver or a compliance archiver, Quick Recovery® agents, and continuous data replication agents. Application-specific data agents 142 can provide improved performance as compared to generic agents. For instance, because application-specific data agents 142 may only handle data for a single software application, the design, operation, and performance of the data agent 142 can be streamlined. The data agent 142 may therefore execute faster and consume less persistent storage and/or operating memory than data agents designed to generically accommodate multiple different software applications 110.

Each data agent 142 may be configured to access data and/or metadata stored in the primary storage device(s) 104 associated with data agent 142 and its host client computing device 102, and process the data appropriately. For example, during a secondary copy operation, data agent 142 may arrange or assemble the data and metadata into one or more files having a certain format (e.g., a particular backup or archive format) before transferring the file(s) to a media agent 144 or other component. The file(s) may include a list of files or other metadata. In some embodiments, a data agent 142 may be distributed between client computing device 102 and storage manager 140 (and any other intermediate components) or may be deployed from a remote location or its functions approximated by a remote process that performs some or all of the functions of data agent 142. In addition, a data agent 142 may perform some functions provided by media agent 144. Other embodiments may employ one or more generic data agents 142 that can handle and process data from two or more different applications 110, or that can handle and process multiple data types, instead of or in addition to using specialized data agents 142. For example, one generic data agent 142 may be used to back up, migrate and restore Microsoft Exchange Mailbox data and Microsoft Exchange Database data, while another generic data agent may handle Microsoft Exchange Public Folder data and Microsoft Windows File System data.

Media Agents

As noted, off-loading certain responsibilities from client computing devices 102 to intermediate components such as secondary storage computing device(s) 106 and corresponding media agent(s) 144 can provide a number of benefits including improved performance of client computing device 102, faster and more reliable information management operations, and enhanced scalability. In one example which will be discussed further below, media agent 144 can act as a local cache of recently-copied data and/or metadata stored to secondary storage device(s) 108, thus improving restore capabilities and performance for the cached data.

Media agent 144 is a component of system 100 and is generally directed by storage manager 140 in creating and restoring secondary copies 116. Whereas storage manager 140 generally manages system 100 as a whole, media agent 144 provides a portal to certain secondary storage devices 108, such as by having specialized features for communicating with and accessing certain associated secondary storage device 108. Media agent 144 may be a software program (e.g., in the form of a set of executable binary files) that executes on a secondary storage computing device 106. Media agent 144 generally manages, coordinates, and facilitates the transmission of data between a data agent 142 (executing on client computing device 102) and secondary storage device(s) 108 associated with media agent 144. For instance, other components in the system may interact with media agent 144 to gain access to data stored on associated secondary storage device(s) 108, (e.g., to browse, read, write, modify, delete, or restore data). Moreover, media agents 144 can generate and store information relating to characteristics of the stored data and/or metadata, or can generate and store other types of information that generally provides insight into the contents of the secondary storage devices 108—generally referred to as indexing of the stored secondary copies 116. Each media agent 144 may operate on a dedicated secondary storage computing device 106, while in other embodiments a plurality of media agents 144 may operate on the same secondary storage computing device 106.

A media agent 144 may be associated with a particular secondary storage device 108 if that media agent 144 is capable of one or more of: routing and/or storing data to the particular secondary storage device 108; coordinating the routing and/or storing of data to the particular secondary storage device 108; retrieving data from the particular secondary storage device 108; coordinating the retrieval of data from the particular secondary storage device 108; and modifying and/or deleting data retrieved from the particular secondary storage device 108. Media agent 144 in certain embodiments is physically separate from the associated secondary storage device 108. For instance, a media agent 144 may operate on a secondary storage computing device 106 in a distinct housing, package, and/or location from the associated secondary storage device 108. In one example, a media agent 144 operates on a first server computer and is in communication with a secondary storage device(s) 108 operating in a separate rack-mounted RAID-based system.

A media agent 144 associated with a particular secondary storage device 108 may instruct secondary storage device 108 to perform an information management task. For instance, a media agent 144 may instruct a tape library to use a robotic arm or other retrieval means to load or eject a certain storage media, and to subsequently archive, migrate, or retrieve data to or from that media, e.g., for the purpose of restoring data to a client computing device 102. As another example, a secondary storage device 108 may include an array of hard disk drives or solid state drives organized in a RAID configuration, and media agent 144 may forward a logical unit number (LUN) and other appropriate information to the array, which uses the received information to execute the desired secondary copy operation. Media agent 144 may communicate with a secondary storage device 108 via a suitable communications link, such as a SCSI or Fibre Channel link.

Each media agent 144 may maintain an associated media agent database 152. Media agent database 152 may be stored to a disk or other storage device (not shown) that is local to the secondary storage computing device 106 on which media agent 144 executes. In other cases, media agent database 152 is stored separately from the host secondary storage computing device 106. Media agent database 152 can include, among other things, a media agent index 153 (see, e.g., FIG. 1C). In some cases, media agent index 153 does not form a part of and is instead separate from media agent database 152.

Media agent index 153 (or “index 153”) may be a data structure associated with the particular media agent 144 that includes information about the stored data associated with the particular media agent and which may be generated in the course of performing a secondary copy operation or a restore. Index 153 provides a fast and efficient mechanism for locating/browsing secondary copies 116 or other data stored in secondary storage devices 108 without having to access secondary storage device 108 to retrieve the information from there. For instance, for each secondary copy 116, index 153 may include metadata such as a list of the data objects (e.g., files/subdirectories, database objects, mailbox objects, etc.), a logical path to the secondary copy 116 on the corresponding secondary storage device 108, location information (e.g., offsets) indicating where the data objects are stored in the secondary storage device 108, when the data objects were created or modified, etc. Thus, index 153 includes metadata associated with the secondary copies 116 that is readily available for use from media agent 144. In some embodiments, some or all of the information in index 153 may instead or additionally be stored along with secondary copies 116 in secondary storage device 108. In some embodiments, a secondary storage device 108 can include sufficient information to enable a “bare metal restore,” where the operating system and/or software applications of a failed client computing device 102 or another target may be automatically restored without manually reinstalling individual software packages (including operating systems).

Because index 153 may operate as a cache, it can also be referred to as an “index cache.” In such cases, information stored in index cache 153 typically comprises data that reflects certain particulars about relatively recent secondary copy operations. After some triggering event, such as after some time elapses or index cache 153 reaches a particular size, certain portions of index cache 153 may be copied or migrated to secondary storage device 108, e.g., on a least-recently-used basis. This information may be retrieved and uploaded back into index cache 153 or otherwise restored to media agent 144 to facilitate retrieval of data from the secondary storage device(s) 108. In some embodiments, the cached information may include format or containerization information related to archives or other files stored on storage device(s) 108.

In some alternative embodiments media agent 144 generally acts as a coordinator or facilitator of secondary copy operations between client computing devices 102 and secondary storage devices 108, but does not actually write the data to secondary storage device 108. For instance, storage manager 140 (or media agent 144) may instruct a client computing device 102 and secondary storage device 108 to communicate with one another directly. In such a case, client computing device 102 transmits data directly or via one or more intermediary components to secondary storage device 108 according to the received instructions, and vice versa. Media agent 144 may still receive, process, and/or maintain metadata related to the secondary copy operations, i.e., may continue to build and maintain index 153. In these embodiments, payload data can flow through media agent 144 for the purposes of populating index 153, but not for writing to secondary storage device 108. Media agent 144 and/or other components such as storage manager 140 may in some cases incorporate additional functionality, such as data classification, content indexing, deduplication, encryption, compression, and the like. Further details regarding these and other functions are described below.

Distributed, Scalable Architecture

As described, certain functions of system 100 can be distributed amongst various physical and/or logical components. For instance, one or more of storage manager 140, data agents 142, and media agents 144 may operate on computing devices that are physically separate from one another. This architecture can provide a number of benefits. For instance, hardware and software design choices for each distributed component can be targeted to suit its particular function. The secondary computing devices 106 on which media agents 144 operate can be tailored for interaction with associated secondary storage devices 108 and provide fast index cache operation, among other specific tasks. Similarly, client computing device(s) 102 can be selected to effectively service applications 110 in order to efficiently produce and store primary data 112.

Moreover, in some cases, one or more of the individual components of information management system 100 can be distributed to multiple separate computing devices. As one example, for large file systems where the amount of data stored in management database 146 is relatively large, database 146 may be migrated to or may otherwise reside on a specialized database server (e.g., an SQL server) separate from a server that implements the other functions of storage manager 140. This distributed configuration can provide added protection because database 146 can be protected with standard database utilities (e.g., SQL log shipping or database replication) independent from other functions of storage manager 140. Database 146 can be efficiently replicated to a remote site for use in the event of a disaster or other data loss at the primary site. Or database 146 can be replicated to another computing device within the same site, such as to a higher performance machine in the event that a storage manager host computing device can no longer service the needs of a growing system 100.

The distributed architecture also provides scalability and efficient component utilization. FIG. 1D shows an embodiment of information management system 100 including a plurality of client computing devices 102 and associated data agents 142 as well as a plurality of secondary storage computing devices 106 and associated media agents 144. Additional components can be added or subtracted based on the evolving needs of system 100. For instance, depending on where bottlenecks are identified, administrators can add additional client computing devices 102, secondary storage computing devices 106, and/or secondary storage devices 108. Moreover, where multiple fungible components are available, load balancing can be implemented to dynamically address identified bottlenecks. As an example, storage manager 140 may dynamically select which media agents 144 and/or secondary storage devices 108 to use for storage operations based on a processing load analysis of media agents 144 and/or secondary storage devices 108, respectively.

Where system 100 includes multiple media agents 144 (see, e.g., FIG. 1D), a first media agent 144 may provide failover functionality for a second failed media agent 144. In addition, media agents 144 can be dynamically selected to provide load balancing. Each client computing device 102 can communicate with, among other components, any of the media agents 144, e.g., as directed by storage manager 140. And each media agent 144 may communicate with, among other components, any of secondary storage devices 108, e.g., as directed by storage manager 140. Thus, operations can be routed to secondary storage devices 108 in a dynamic and highly flexible manner, to provide load balancing, failover, etc. Further examples of scalable systems capable of dynamic storage operations, load balancing, and failover are provided in U.S. Pat. No. 7,246,207.

While distributing functionality amongst multiple computing devices can have certain advantages, in other contexts it can be beneficial to consolidate functionality on the same computing device. In alternative configurations, certain components may reside and execute on the same computing device. As such, in other embodiments, one or more of the components shown in FIG. 1C may be implemented on the same computing device. In one configuration, a storage manager 140, one or more data agents 142, and/or one or more media agents 144 are all implemented on the same computing device. In other embodiments, one or more data agents 142 and one or more media agents 144 are implemented on the same computing device, while storage manager 140 is implemented on a separate computing device, etc. without limitation.

Exemplary Types of Information Management Operations, Including Storage Operations

In order to protect and leverage stored data, system 100 can be configured to perform a variety of information management operations, which may also be referred to in some cases as storage management operations or storage operations. These operations can generally include (i) data movement operations, (ii) processing and data manipulation operations, and (iii) analysis, reporting, and management operations.

Data Movement Operations, Including Secondary Copy Operations

Data movement operations are generally storage operations that involve the copying or migration of data between different locations in system 100. For example, data movement operations can include operations in which stored data is copied, migrated, or otherwise transferred from one or more first storage devices to one or more second storage devices, such as from primary storage device(s) 104 to secondary storage device(s) 108, from secondary storage device(s) 108 to different secondary storage device(s) 108, from secondary storage devices 108 to primary storage devices 104, or from primary storage device(s) 104 to different primary storage device(s) 104, or in some cases within the same primary storage device 104 such as within a storage array.

Data movement operations can include by way of example, backup operations, archive operations, information lifecycle management operations such as hierarchical storage management operations, replication operations (e.g., continuous data replication), snapshot operations, deduplication or single-instancing operations, auxiliary copy operations, disaster-recovery copy operations, and the like. As will be discussed, some of these operations do not necessarily create distinct copies. Nonetheless, some or all of these operations are generally referred to as “secondary copy operations” for simplicity, because they involve secondary copies. Data movement also comprises restoring secondary copies.

Backup Operations

A backup operation creates a copy of a version of primary data 112 at a particular point in time (e.g., one or more files or other data units). Each subsequent backup copy 116 (which is a form of secondary copy 116) may be maintained independently of the first. A backup generally involves maintaining a version of the copied primary data 112 as well as backup copies 116. Further, a backup copy in some embodiments is generally stored in a form that is different from the native format, e.g., a backup format. This contrasts to the version in primary data 112 which may instead be stored in a format native to the source application(s) 110. In various cases, backup copies can be stored in a format in which the data is compressed, encrypted, deduplicated, and/or otherwise modified from the original native application format. For example, a backup copy may be stored in a compressed backup format that facilitates efficient long-term storage. Backup copies 116 can have relatively long retention periods as compared to primary data 112, which is generally highly changeable. Backup copies 116 may be stored on media with slower retrieval times than primary storage device 104. Some backup copies may have shorter retention periods than some other types of secondary copies 116, such as archive copies (described below). Backups may be stored at an offsite location.

Backup operations can include full backups, differential backups, incremental backups, “synthetic full” backups, and/or creating a “reference copy.” A full backup (or “standard full backup”) in some embodiments is generally a complete image of the data to be protected. However, because full backup copies can consume a relatively large amount of storage, it can be useful to use a full backup copy as a baseline and only store changes relative to the full backup copy afterwards.

A differential backup operation (or cumulative incremental backup operation) tracks and stores changes that occurred since the last full backup. Differential backups can grow quickly in size, but can restore relatively efficiently because a restore can be completed in some cases using only the full backup copy and the latest differential copy.

An incremental backup operation generally tracks and stores changes since the most recent backup copy of any type, which can greatly reduce storage utilization. In some cases, however, restoring can be lengthy compared to full or differential backups because completing a restore operation may involve accessing a full backup in addition to multiple incremental backups.

Synthetic full backups generally consolidate data without directly backing up data from the client computing device. A synthetic full backup is created from the most recent full backup (i.e., standard or synthetic) and subsequent incremental and/or differential backups. The resulting synthetic full backup is identical to what would have been created had the last backup for the subclient been a standard full backup. Unlike standard full, incremental, and differential backups, however, a synthetic full backup does not actually transfer data from primary storage to the backup media, because it operates as a backup consolidator. A synthetic full backup extracts the index data of each participating subclient. Using this index data and the previously backed up user data images, it builds new full backup images (e.g., bitmaps), one for each subclient. The new backup images consolidate the index and user data stored in the related incremental, differential, and previous full backups into a synthetic backup file that fully represents the subclient (e.g., via pointers) but does not comprise all its constituent data.

Any of the above types of backup operations can be at the volume level, file level, or block level. Volume level backup operations generally involve copying of a data volume (e.g., a logical disk or partition) as a whole. In a file-level backup, information management system 100 generally tracks changes to individual files and includes copies of files in the backup copy. For block-level backups, files are broken into constituent blocks, and changes are tracked at the block level. Upon restore, system 100 reassembles the blocks into files in a transparent fashion. Far less data may actually be transferred and copied to secondary storage devices 108 during a file-level copy than a volume-level copy. Likewise, a block-level copy may transfer less data than a file-level copy, resulting in faster execution. However, restoring a relatively higher-granularity copy can result in longer restore times. For instance, when restoring a block-level copy, the process of locating and retrieving constituent blocks can sometimes take longer than restoring file-level backups.

A reference copy may comprise copy(ies) of selected objects from backed up data, typically to help organize data by keeping contextual information from multiple sources together, and/or help retain specific data for a longer period of time, such as for legal hold needs. A reference copy generally maintains data integrity, and when the data is restored, it may be viewed in the same format as the source data. In some embodiments, a reference copy is based on a specialized client, individual subclient and associated information management policies (e.g., storage policy, retention policy, etc.) that are administered within system 100.

Archive Operations

Because backup operations generally involve maintaining a version of the copied primary data 112 and also maintaining backup copies in secondary storage device(s) 108, they can consume significant storage capacity. To reduce storage consumption, an archive operation according to certain embodiments creates an archive copy 116 by both copying and removing source data. Or, seen another way, archive operations can involve moving some or all of the source data to the archive destination. Thus, data satisfying criteria for removal (e.g., data of a threshold age or size) may be removed from source storage. The source data may be primary data 112 or a secondary copy 116, depending on the situation. As with backup copies, archive copies can be stored in a format in which the data is compressed, encrypted, deduplicated, and/or otherwise modified from the format of the original application or source copy. In addition, archive copies may be retained for relatively long periods of time (e.g., years) and, in some cases are never deleted. In certain embodiments, archive copies may be made and kept for extended periods in order to meet compliance regulations.

Archiving can also serve the purpose of freeing up space in primary storage device(s) 104 and easing the demand on computational resources on client computing device 102. Similarly, when a secondary copy 116 is archived, the archive copy can therefore serve the purpose of freeing up space in the source secondary storage device(s) 108. Examples of data archiving operations are provided in U.S. Pat. No. 7,107,298.

Snapshot Operations

Snapshot operations can provide a relatively lightweight, efficient mechanism for protecting data. From an end-user viewpoint, a snapshot may be thought of as an “instant” image of primary data 112 at a given point in time, and may include state and/or status information relative to an application 110 that creates/manages primary data 112. In one embodiment, a snapshot may generally capture the directory structure of an object in primary data 112 such as a file or volume or other data set at a particular moment in time and may also preserve file attributes and contents. A snapshot in some cases is created relatively quickly, e.g., substantially instantly, using a minimum amount of file space, but may still function as a conventional file system backup.

A “hardware snapshot” (or “hardware-based snapshot”) operation occurs where a target storage device (e.g., a primary storage device 104 or a secondary storage device 108) performs the snapshot operation in a self-contained fashion, substantially independently, using hardware, firmware and/or software operating on the storage device itself. For instance, the storage device may perform snapshot operations generally without intervention or oversight from any of the other components of the system 100, e.g., a storage array may generate an “array-created” hardware snapshot and may also manage its storage, integrity, versioning, etc. In this manner, hardware snapshots can off-load other components of system 100 from snapshot processing. An array may receive a request from another component to take a snapshot and then proceed to execute the “hardware snapshot” operations autonomously, preferably reporting success to the requesting component.

A “software snapshot” (or “software-based snapshot”) operation, on the other hand, occurs where a component in system 100 (e.g., client computing device 102, etc.) implements a software layer that manages the snapshot operation via interaction with the target storage device. For instance, the component executing the snapshot management software layer may derive a set of pointers and/or data that represents the snapshot. The snapshot management software layer may then transmit the same to the target storage device, along with appropriate instructions for writing the snapshot. One example of a software snapshot product is Microsoft Volume Snapshot Service (VSS), which is part of the Microsoft Windows operating system.

Some types of snapshots do not actually create another physical copy of all the data as it existed at the particular point in time, but may simply create pointers that map files and directories to specific memory locations (e.g., to specific disk blocks) where the data resides as it existed at the particular point in time. For example, a snapshot copy may include a set of pointers derived from the file system or from an application. In some other cases, the snapshot may be created at the block-level, such that creation of the snapshot occurs without awareness of the file system. Each pointer points to a respective stored data block, so that collectively, the set of pointers reflect the storage location and state of the data object (e.g., file(s) or volume(s) or data set(s)) at the point in time when the snapshot copy was created.

An initial snapshot may use only a small amount of disk space needed to record a mapping or other data structure representing or otherwise tracking the blocks that correspond to the current state of the file system. Additional disk space is usually required only when files and directories change later on. Furthermore, when files change, typically only the pointers which map to blocks are copied, not the blocks themselves. For example for “copy-on-write” snapshots, when a block changes in primary storage, the block is copied to secondary storage or cached in primary storage before the block is overwritten in primary storage, and the pointer to that block is changed to reflect the new location of that block. The snapshot mapping of file system data may also be updated to reflect the changed block(s) at that particular point in time. In some other cases, a snapshot includes a full physical copy of all or substantially all of the data represented by the snapshot. Further examples of snapshot operations are provided in U.S. Pat. No. 7,529,782. A snapshot copy in many cases can be made quickly and without significantly impacting primary computing resources because large amounts of data need not be copied or moved. In some embodiments, a snapshot may exist as a virtual file system, parallel to the actual file system. Users in some cases gain read-only access to the record of files and directories of the snapshot. By electing to restore primary data 112 from a snapshot taken at a given point in time, users may also return the current file system to the state of the file system that existed when the snapshot was taken.

Replication Operations

Replication is another type of secondary copy operation. Some types of secondary copies 116 periodically capture images of primary data 112 at particular points in time (e.g., backups, archives, and snapshots). However, it can also be useful for recovery purposes to protect primary data 112 in a more continuous fashion, by replicating primary data 112 substantially as changes occur. In some cases a replication copy can be a mirror copy, for instance, where changes made to primary data 112 are mirrored or substantially immediately copied to another location (e.g., to secondary storage device(s) 108). By copying each write operation to the replication copy, two storage systems are kept synchronized or substantially synchronized so that they are virtually identical at approximately the same time. Where entire disk volumes are mirrored, however, mirroring can require significant amount of storage space and utilizes a large amount of processing resources.

According to some embodiments, secondary copy operations are performed on replicated data that represents a recoverable state, or “known good state” of a particular application running on the source system. For instance, in certain embodiments, known good replication copies may be viewed as copies of primary data 112. This feature allows the system to directly access, copy, restore, back up, or otherwise manipulate the replication copies as if they were the “live” primary data 112. This can reduce access time, storage utilization, and impact on source applications 110, among other benefits. Based on known good state information, system 100 can replicate sections of application data that represent a recoverable state rather than rote copying of blocks of data. Examples of replication operations (e.g., continuous data replication) are provided in U.S. Pat. No. 7,617,262.

Deduplication/Single-Instancing Operations

Deduplication or single-instance storage is useful to reduce the amount of non-primary data. For instance, some or all of the above-described secondary copy operations can involve deduplication in some fashion. New data is read, broken down into data portions of a selected granularity (e.g., sub-file level blocks, files, etc.), compared with corresponding portions that are already in secondary storage, and only new/changed portions are stored. Portions that already exist are represented as pointers to the already-stored data. Thus, a deduplicated secondary copy 116 may comprise actual data portions copied from primary data 112 and may further comprise pointers to already-stored data, which is generally more storage-efficient than a full copy.

In order to streamline the comparison process, system 100 may calculate and/or store signatures (e.g., hashes or cryptographically unique IDs) corresponding to the individual source data portions and compare the signatures to already-stored data signatures, instead of comparing entire data portions. In some cases, only a single instance of each data portion is stored, and deduplication operations may therefore be referred to interchangeably as “single-instancing” operations. Depending on the implementation, however, deduplication operations can store more than one instance of certain data portions, yet still significantly reduce stored-data redundancy. Depending on the embodiment, deduplication portions such as data blocks can be of fixed or variable length. Using variable length blocks can enhance deduplication by responding to changes in the data stream, but can involve more complex processing. In some cases, system 100 utilizes a technique for dynamically aligning deduplication blocks based on changing content in the data stream, as described in U.S. Pat. No. 8,364,652.

System 100 can deduplicate in a variety of manners at a variety of locations. For instance, in some embodiments, system 100 implements “target-side” deduplication by deduplicating data at the media agent 144 after being received from data agent 142. In some such cases, media agents 144 are generally configured to manage the deduplication process. For instance, one or more of the media agents 144 maintain a corresponding deduplication database that stores deduplication information (e.g., datablock signatures). Examples of such a configuration are provided in U.S. Pat. No. 9,020,900. Instead of or in combination with “target-side” deduplication, “source-side” (or “client-side”) deduplication can also be performed, e.g., to reduce the amount of data to be transmitted by data agent 142 to media agent 144. Storage manager 140 may communicate with other components within system 100 via network protocols and cloud service provider APIs to facilitate cloud-based deduplication/single instancing, as exemplified in U.S. Pat. No. 8,954,446. Some other deduplication/single instancing techniques are described in U.S. Pat. Pub. No. 2006/0224846 and in U.S. Pat. No. 9,098,495.

Information Lifecycle Management and Hierarchical Storage Management

In some embodiments, files and other data over their lifetime move from more expensive quick-access storage to less expensive slower-access storage. Operations associated with moving data through various tiers of storage are sometimes referred to as information lifecycle management (ILM) operations.

One type of ILM operation is a hierarchical storage management (HSM) operation, which generally automatically moves data between classes of storage devices, such as from high-cost to low-cost storage devices. For instance, an HSM operation may involve movement of data from primary storage devices 104 to secondary storage devices 108, or between tiers of secondary storage devices 108. With each tier, the storage devices may be progressively cheaper, have relatively slower access/restore times, etc. For example, movement of data between tiers may occur as data becomes less important over time. In some embodiments, an HSM operation is similar to archiving in that creating an HSM copy may (though not always) involve deleting some of the source data, e.g., according to one or more criteria related to the source data. For example, an HSM copy may include primary data 112 or a secondary copy 116 that exceeds a given size threshold or a given age threshold. Often, and unlike some types of archive copies, HSM data that is removed or aged from the source is replaced by a logical reference pointer or stub. The reference pointer or stub can be stored in the primary storage device 104 or other source storage device, such as a secondary storage device 108 to replace the deleted source data and to point to or otherwise indicate the new location in (another) secondary storage device 108.

For example, files are generally moved between higher and lower cost storage depending on how often the files are accessed. When a user requests access to HSM data that has been removed or migrated, system 100 uses the stub to locate the data and may make recovery of the data appear transparent, even though the HSM data may be stored at a location different from other source data. In this manner, the data appears to the user (e.g., in file system browsing windows and the like) as if it still resides in the source location (e.g., in a primary storage device 104). The stub may include metadata associated with the corresponding data, so that a file system and/or application can provide some information about the data object and/or a limited-functionality version (e.g., a preview) of the data object.

An HSM copy may be stored in a format other than the native application format (e.g., compressed, encrypted, deduplicated, and/or otherwise modified). In some cases, copies which involve the removal of data from source storage and the maintenance of stub or other logical reference information on source storage may be referred to generally as “on-line archive copies.” On the other hand, copies which involve the removal of data from source storage without the maintenance of stub or other logical reference information on source storage may be referred to as “off-line archive copies.” Examples of HSM and ILM techniques are provided in U.S. Pat. No. 7,343,453.

Auxiliary Copy Operations

An auxiliary copy is generally a copy of an existing secondary copy 116. For instance, an initial secondary copy 116 may be derived from primary data 112 or from data residing in secondary storage subsystem 118, whereas an auxiliary copy is generated from the initial secondary copy 116. Auxiliary copies provide additional standby copies of data and may reside on different secondary storage devices 108 than the initial secondary copies 116. Thus, auxiliary copies can be used for recovery purposes if initial secondary copies 116 become unavailable. Exemplary auxiliary copy techniques are described in further detail in U.S. Pat. No. 8,230,195.

Disaster-Recovery Copy Operations

System 100 may also make and retain disaster recovery copies, often as secondary, high-availability disk copies. System 100 may create secondary copies and store them at disaster recovery locations using auxiliary copy or replication operations, such as continuous data replication technologies. Depending on the particular data protection goals, disaster recovery locations can be remote from the client computing devices 102 and primary storage devices 104, remote from some or all of the secondary storage devices 108, or both.

Data Manipulation, Including Encryption and Compression

Data manipulation and processing may include encryption and compression as well as integrity marking and checking, formatting for transmission, formatting for storage, etc. Data may be manipulated “client-side” by data agent 142 as well as “target-side” by media agent 144 in the course of creating secondary copy 116, or conversely in the course of restoring data from secondary to primary.

Encryption Operations

System 100 in some cases is configured to process data (e.g., files or other data objects, primary data 112, secondary copies 116, etc.), according to an appropriate encryption algorithm (e.g., Blowfish, Advanced Encryption Standard (AES), Triple Data Encryption Standard (3-DES), etc.) to limit access and provide data security. System 100 in some cases encrypts the data at the client level, such that client computing devices 102 (e.g., data agents 142) encrypt the data prior to transferring it to other components, e.g., before sending the data to media agents 144 during a secondary copy operation. In such cases, client computing device 102 may maintain or have access to an encryption key or passphrase for decrypting the data upon restore. Encryption can also occur when media agent 144 creates auxiliary copies or archive copies. Encryption may be applied in creating a secondary copy 116 of a previously unencrypted secondary copy 116, without limitation. In further embodiments, secondary storage devices 108 can implement built-in, high performance hardware-based encryption.

Compression Operations

Similar to encryption, system 100 may also or alternatively compress data in the course of generating a secondary copy 116. Compression encodes information such that fewer bits are needed to represent the information as compared to the original representation. Compression techniques are well known in the art. Compression operations may apply one or more data compression algorithms. Compression may be applied in creating a secondary copy 116 of a previously uncompressed secondary copy, e.g., when making archive copies or disaster recovery copies. The use of compression may result in metadata that specifies the nature of the compression, so that data may be uncompressed on restore if appropriate.

Data Analysis, Reporting, and Management Operations

Data analysis, reporting, and management operations can differ from data movement operations in that they do not necessarily involve copying, migration or other transfer of data between different locations in the system. For instance, data analysis operations may involve processing (e.g., offline processing) or modification of already stored primary data 112 and/or secondary copies 116. However, in some embodiments data analysis operations are performed in conjunction with data movement operations. Some data analysis operations include content indexing operations and classification operations which can be useful in leveraging data under management to enhance search and other features.

Classification Operations/Content Indexing

In some embodiments, information management system 100 analyzes and indexes characteristics, content, and metadata associated with primary data 112 (“online content indexing”) and/or secondary copies 116 (“off-line content indexing”). Content indexing can identify files or other data objects based on content (e.g., user-defined keywords or phrases, other keywords/phrases that are not defined by a user, etc.), and/or metadata (e.g., email metadata such as “to,” “from,” “cc,” “bcc,” attachment name, received time, etc.). Content indexes may be searched and search results may be restored.

System 100 generally organizes and catalogues the results into a content index, which may be stored within media agent database 152, for example. The content index can also include the storage locations of or pointer references to indexed data in primary data 112 and/or secondary copies 116. Results may also be stored elsewhere in system 100 (e.g., in primary storage device 104 or in secondary storage device 108). Such content index data provides storage manager 140 or other components with an efficient mechanism for locating primary data 112 and/or secondary copies 116 of data objects that match particular criteria, thus greatly increasing the search speed capability of system 100. For instance, search criteria can be specified by a user through user interface 158 of storage manager 140. Moreover, when system 100 analyzes data and/or metadata in secondary copies 116 to create an “off-line content index,” this operation has no significant impact on the performance of client computing devices 102 and thus does not take a toll on the production environment. Examples of content indexing techniques are provided in U.S. Pat. No. 8,170,995.

One or more components, such as a content index engine, can be configured to scan data and/or associated metadata for classification purposes to populate a database (or other data structure) of information, which can be referred to as a “data classification database” or a “metabase.” Depending on the embodiment, the data classification database(s) can be organized in a variety of different ways, including centralization, logical sub-divisions, and/or physical sub-divisions. For instance, one or more data classification databases may be associated with different subsystems or tiers within system 100. As an example, there may be a first metabase associated with primary storage subsystem 117 and a second metabase associated with secondary storage subsystem 118. In other cases, metabase(s) may be associated with individual components, e.g., client computing devices 102 and/or media agents 144. In some embodiments, a data classification database may reside as one or more data structures within management database 146, may be otherwise associated with storage manager 140, and/or may reside as a separate component. In some cases, metabase(s) may be included in separate database(s) and/or on separate storage device(s) from primary data 112 and/or secondary copies 116, such that operations related to the metabase(s) do not significantly impact performance on other components of system 100. In other cases, metabase(s) may be stored along with primary data 112 and/or secondary copies 116. Files or other data objects can be associated with identifiers (e.g., tag entries, etc.) to facilitate searches of stored data objects. Among a number of other benefits, the metabase can also allow efficient, automatic identification of files or other data objects to associate with secondary copy or other information management operations. For instance, a metabase can dramatically improve the speed with which system 100 can search through and identify data as compared to other approaches that involve scanning an entire file system. Examples of metabases and data classification operations are provided in U.S. Pat. Nos. 7,734,669 and 7,747,579.

Management and Reporting Operations

Certain embodiments leverage the integrated ubiquitous nature of system 100 to provide useful system-wide management and reporting. Operations management can generally include monitoring and managing the health and performance of system 100 by, without limitation, performing error tracking, generating granular storage/performance metrics (e.g., job success/failure information, deduplication efficiency, etc.), generating storage modeling and costing information, and the like. As an example, storage manager 140 or another component in system 100 may analyze traffic patterns and suggest and/or automatically route data to minimize congestion. In some embodiments, the system can generate predictions relating to storage operations or storage operation information. Such predictions, which may be based on a trending analysis, may predict various network operations or resource usage, such as network traffic levels, storage media use, use of bandwidth of communication links, use of media agent components, etc. Further examples of traffic analysis, trend analysis, prediction generation, and the like are described in U.S. Pat. No. 7,343,453.

In some configurations having a hierarchy of storage operation cells, a master storage manager 140 may track the status of subordinate cells, such as the status of jobs, system components, system resources, and other items, by communicating with storage managers 140 (or other components) in the respective storage operation cells. Moreover, the master storage manager 140 may also track status by receiving periodic status updates from the storage managers 140 (or other components) in the respective cells regarding jobs, system components, system resources, and other items. In some embodiments, a master storage manager 140 may store status information and other information regarding its associated storage operation cells and other system information in its management database 146 and/or index 150 (or in another location). The master storage manager 140 or other component may also determine whether certain storage-related or other criteria are satisfied, and may perform an action or trigger event (e.g., data migration) in response to the criteria being satisfied, such as where a storage threshold is met for a particular volume, or where inadequate protection exists for certain data. For instance, data from one or more storage operation cells is used to dynamically and automatically mitigate recognized risks, and/or to advise users of risks or suggest actions to mitigate these risks. For example, an information management policy may specify certain requirements (e.g., that a storage device should maintain a certain amount of free space, that secondary copies should occur at a particular interval, that data should be aged and migrated to other storage after a particular period, that data on a secondary volume should always have a certain level of availability and be restorable within a given time period, that data on a secondary volume may be mirrored or otherwise migrated to a specified number of other volumes, etc.). If a risk condition or other criterion is triggered, the system may notify the user of these conditions and may suggest (or automatically implement) a mitigation action to address the risk. For example, the system may indicate that data from a primary copy 112 should be migrated to a secondary storage device 108 to free up space on primary storage device 104. Examples of the use of risk factors and other triggering criteria are described in U.S. Pat. No. 7,343,453.

In some embodiments, system 100 may also determine whether a metric or other indication satisfies particular storage criteria sufficient to perform an action. For example, a storage policy or other definition might indicate that a storage manager 140 should initiate a particular action if a storage metric or other indication drops below or otherwise fails to satisfy specified criteria such as a threshold of data protection. In some embodiments, risk factors may be quantified into certain measurable service or risk levels. For example, certain applications and associated data may be considered to be more important relative to other data and services. Financial compliance data, for example, may be of greater importance than marketing materials, etc. Network administrators may assign priority values or “weights” to certain data and/or applications corresponding to the relative importance. The level of compliance of secondary copy operations specified for these applications may also be assigned a certain value. Thus, the health, impact, and overall importance of a service may be determined, such as by measuring the compliance value and calculating the product of the priority value and the compliance value to determine the “service level” and comparing it to certain operational thresholds to determine whether it is acceptable. Further examples of the service level determination are provided in U.S. Pat. No. 7,343,453.

System 100 may additionally calculate data costing and data availability associated with information management operation cells. For instance, data received from a cell may be used in conjunction with hardware-related information and other information about system elements to determine the cost of storage and/or the availability of particular data. Exemplary information generated could include how fast a particular department is using up available storage space, how long data would take to recover over a particular pathway from a particular secondary storage device, costs over time, etc. Moreover, in some embodiments, such information may be used to determine or predict the overall cost associated with the storage of certain information. The cost associated with hosting a certain application may be based, at least in part, on the type of media on which the data resides, for example. Storage devices may be assigned to a particular cost categories, for example. Further examples of costing techniques are described in U.S. Pat. No. 7,343,453.

Any of the above types of information (e.g., information related to trending, predictions, job, cell or component status, risk, service level, costing, etc.) can generally be provided to users via user interface 158 in a single integrated view or console (not shown). Report types may include: scheduling, event management, media management and data aging. Available reports may also include backup history, data aging history, auxiliary copy history, job history, library and drive, media in library, restore history, and storage policy, etc., without limitation. Such reports may be specified and created at a certain point in time as a system analysis, forecasting, or provisioning tool. Integrated reports may also be generated that illustrate storage and performance metrics, risks and storage costing information. Moreover, users may create their own reports based on specific needs. User interface 158 can include an option to graphically depict the various components in the system using appropriate icons. As one example, user interface 158 may provide a graphical depiction of primary storage devices 104, secondary storage devices 108, data agents 142 and/or media agents 144, and their relationship to one another in system 100.

In general, the operations management functionality of system 100 can facilitate planning and decision-making. For example, in some embodiments, a user may view the status of some or all jobs as well as the status of each component of information management system 100. Users may then plan and make decisions based on this data. For instance, a user may view high-level information regarding secondary copy operations for system 100, such as job status, component status, resource status (e.g., communication pathways, etc.), and other information. The user may also drill down or use other means to obtain more detailed information regarding a particular component, job, or the like. Further examples are provided in U.S. Pat. No. 7,343,453.

System 100 can also be configured to perform system-wide e-discovery operations in some embodiments. In general, e-discovery operations provide a unified collection and search capability for data in the system, such as data stored in secondary storage devices 108 (e.g., backups, archives, or other secondary copies 116). For example, system 100 may construct and maintain a virtual repository for data stored in system 100 that is integrated across source applications 110, different storage device types, etc. According to some embodiments, e-discovery utilizes other techniques described herein, such as data classification and/or content indexing.

Information Management Policies

An information management policy 148 can include a data structure or other information source that specifies a set of parameters (e.g., criteria and rules) associated with secondary copy and/or other information management operations.

One type of information management policy 148 is a “storage policy.” According to certain embodiments, a storage policy generally comprises a data structure or other information source that defines (or includes information sufficient to determine) a set of preferences or other criteria for performing information management operations. Storage policies can include one or more of the following: (1) what data will be associated with the storage policy, e.g., subclient; (2) a destination to which the data will be stored; (3) datapath information specifying how the data will be communicated to the destination; (4) the type of secondary copy operation to be performed; and (5) retention information specifying how long the data will be retained at the destination (see, e.g., FIG. 1E). Data associated with a storage policy can be logically organized into subclients, which may represent primary data 112 and/or secondary copies 116. A subclient may represent static or dynamic associations of portions of a data volume. Subclients may represent mutually exclusive portions. Thus, in certain embodiments, a portion of data may be given a label and the association is stored as a static entity in an index, database or other storage location. Subclients may also be used as an effective administrative scheme of organizing data according to data type, department within the enterprise, storage preferences, or the like. Depending on the configuration, subclients can correspond to files, folders, virtual machines, databases, etc. In one exemplary scenario, an administrator may find it preferable to separate e-mail data from financial data using two different subclients.

A storage policy can define where data is stored by specifying a target or destination storage device (or group of storage devices). For instance, where the secondary storage device 108 includes a group of disk libraries, the storage policy may specify a particular disk library for storing the subclients associated with the policy. As another example, where the secondary storage devices 108 include one or more tape libraries, the storage policy may specify a particular tape library for storing the subclients associated with the storage policy, and may also specify a drive pool and a tape pool defining a group of tape drives and a group of tapes, respectively, for use in storing the subclient data. While information in the storage policy can be statically assigned in some cases, some or all of the information in the storage policy can also be dynamically determined based on criteria set forth in the storage policy. For instance, based on such criteria, a particular destination storage device(s) or other parameter of the storage policy may be determined based on characteristics associated with the data involved in a particular secondary copy operation, device availability (e.g., availability of a secondary storage device 108 or a media agent 144), network status and conditions (e.g., identified bottlenecks), user credentials, and the like.

Datapath information can also be included in the storage policy. For instance, the storage policy may specify network pathways and components to utilize when moving the data to the destination storage device(s). In some embodiments, the storage policy specifies one or more media agents 144 for conveying data associated with the storage policy between the source and destination. A storage policy can also specify the type(s) of associated operations, such as backup, archive, snapshot, auxiliary copy, or the like. Furthermore, retention parameters can specify how long the resulting secondary copies 116 will be kept (e.g., a number of days, months, years, etc.), perhaps depending on organizational needs and/or compliance criteria.

When adding a new client computing device 102, administrators can manually configure information management policies 148 and/or other settings, e.g., via user interface 158. However, this can be an involved process resulting in delays, and it may be desirable to begin data protection operations quickly, without awaiting human intervention. Thus, in some embodiments, system 100 automatically applies a default configuration to client computing device 102. As one example, when one or more data agent(s) 142 are installed on a client computing device 102, the installation script may register the client computing device 102 with storage manager 140, which in turn applies the default configuration to the new client computing device 102. In this manner, data protection operations can begin substantially immediately. The default configuration can include a default storage policy, for example, and can specify any appropriate information sufficient to begin data protection operations. This can include a type of data protection operation, scheduling information, a target secondary storage device 108, data path information (e.g., a particular media agent 144), and the like.

Another type of information management policy 148 is a “scheduling policy,” which specifies when and how often to perform operations. Scheduling parameters may specify with what frequency (e.g., hourly, weekly, daily, event-based, etc.) or under what triggering conditions secondary copy or other information management operations are to take place. Scheduling policies in some cases are associated with particular components, such as a subclient, client computing device 102, and the like.

Another type of information management policy 148 is an “audit policy” (or “security policy”), which comprises preferences, rules and/or criteria that protect sensitive data in system 100. For example, an audit policy may define “sensitive objects” which are files or data objects that contain particular keywords (e.g., “confidential,” or “privileged”) and/or are associated with particular keywords (e.g., in metadata) or particular flags (e.g., in metadata identifying a document or email as personal, confidential, etc.). An audit policy may further specify rules for handling sensitive objects. As an example, an audit policy may require that a reviewer approve the transfer of any sensitive objects to a cloud storage site, and that if approval is denied for a particular sensitive object, the sensitive object should be transferred to a local primary storage device 104 instead. To facilitate this approval, the audit policy may further specify how a secondary storage computing device 106 or other system component should notify a reviewer that a sensitive object is slated for transfer.

Another type of information management policy 148 is a “provisioning policy,” which can include preferences, priorities, rules, and/or criteria that specify how client computing devices 102 (or groups thereof) may utilize system resources, such as available storage on cloud storage and/or network bandwidth. A provisioning policy specifies, for example, data quotas for particular client computing devices 102 (e.g., a number of gigabytes that can be stored monthly, quarterly or annually). Storage manager 140 or other components may enforce the provisioning policy. For instance, media agents 144 may enforce the policy when transferring data to secondary storage devices 108. If a client computing device 102 exceeds a quota, a budget for the client computing device 102 (or associated department) may be adjusted accordingly or an alert may trigger.

While the above types of information management policies 148 are described as separate policies, one or more of these can be generally combined into a single information management policy 148. For instance, a storage policy may also include or otherwise be associated with one or more scheduling, audit, or provisioning policies or operational parameters thereof. Moreover, while storage policies are typically associated with moving and storing data, other policies may be associated with other types of information management operations. The following is a non-exhaustive list of items that information management policies 148 may specify:

-   -   schedules or other timing information, e.g., specifying when         and/or how often to perform information management operations;     -   the type of secondary copy 116 and/or copy format (e.g.,         snapshot, backup, archive, HSM, etc.);     -   a location or a class or quality of storage for storing         secondary copies 116 (e.g., one or more particular secondary         storage devices 108);     -   preferences regarding whether and how to encrypt, compress,         deduplicate, or otherwise modify or transform secondary copies         116;     -   which system components and/or network pathways (e.g., preferred         media agents 144) should be used to perform secondary storage         operations;     -   resource allocation among different computing devices or other         system components used in performing information management         operations (e.g., bandwidth allocation, available storage         capacity, etc.);     -   whether and how to synchronize or otherwise distribute files or         other data objects across multiple computing devices or hosted         services; and     -   retention information specifying the length of time primary data         112 and/or secondary copies 116 should be retained, e.g., in a         particular class or tier of storage devices, or within the         system 100.

Information management policies 148 can additionally specify or depend on historical or current criteria that may be used to determine which rules to apply to a particular data object, system component, or information management operation, such as:

-   -   frequency with which primary data 112 or a secondary copy 116 of         a data object or metadata has been or is predicted to be used,         accessed, or modified;     -   time-related factors (e.g., aging information such as time since         the creation or modification of a data object);     -   deduplication information (e.g., hashes, data blocks,         deduplication block size, deduplication efficiency or other         metrics);     -   an estimated or historic usage or cost associated with different         components (e.g., with secondary storage devices 108);     -   the identity of users, applications 110, client computing         devices 102 and/or other computing devices that created,         accessed, modified, or otherwise utilized primary data 112 or         secondary copies 116;     -   a relative sensitivity (e.g., confidentiality, importance) of a         data object, e.g., as determined by its content and/or metadata;     -   the current or historical storage capacity of various storage         devices;     -   the current or historical network capacity of network pathways         connecting various components within the storage operation cell;     -   access control lists or other security information; and     -   the content of a particular data object (e.g., its textual         content) or of metadata associated with the data object.

Exemplary Storage Policy and Secondary Copy Operations

FIG. 1E includes a data flow diagram depicting performance of secondary copy operations by an embodiment of information management system 100, according to an exemplary storage policy 148A. System 100 includes a storage manager 140, a client computing device 102 having a file system data agent 142A and an email data agent 142B operating thereon, a primary storage device 104, two media agents 144A, 144B, and two secondary storage devices 108: a disk library 108A and a tape library 108B. As shown, primary storage device 104 includes primary data 112A, which is associated with a logical grouping of data associated with a file system (“file system subclient”), and primary data 112B, which is a logical grouping of data associated with email (“email subclient”). The techniques described with respect to FIG. 1E can be utilized in conjunction with data that is otherwise organized as well.

As indicated by the dashed box, the second media agent 144B and tape library 108B are “off-site,” and may be remotely located from the other components in system 100 (e.g., in a different city, office building, etc.). Indeed, “off-site” may refer to a magnetic tape located in remote storage, which must be manually retrieved and loaded into a tape drive to be read. In this manner, information stored on the tape library 108B may provide protection in the event of a disaster or other failure at the main site(s) where data is stored.

The file system subclient 112A in certain embodiments generally comprises information generated by the file system and/or operating system of client computing device 102, and can include, for example, file system data (e.g., regular files, file tables, mount points, etc.), operating system data (e.g., registries, event logs, etc.), and the like. The e-mail subclient 112B can include data generated by an e-mail application operating on client computing device 102, e.g., mailbox information, folder information, emails, attachments, associated database information, and the like. As described above, the subclients can be logical containers, and the data included in the corresponding primary data 112A and 112B may or may not be stored contiguously.

The exemplary storage policy 148A includes backup copy preferences or rule set 160, disaster recovery copy preferences or rule set 162, and compliance copy preferences or rule set 164. Backup copy rule set 160 specifies that it is associated with file system subclient 166 and email subclient 168. Each of subclients 166 and 168 are associated with the particular client computing device 102. Backup copy rule set 160 further specifies that the backup operation will be written to disk library 108A and designates a particular media agent 144A to convey the data to disk library 108A. Finally, backup copy rule set 160 specifies that backup copies created according to rule set 160 are scheduled to be generated hourly and are to be retained for 30 days. In some other embodiments, scheduling information is not included in storage policy 148A and is instead specified by a separate scheduling policy.

Disaster recovery copy rule set 162 is associated with the same two subclients 166 and 168. However, disaster recovery copy rule set 162 is associated with tape library 108B, unlike backup copy rule set 160. Moreover, disaster recovery copy rule set 162 specifies that a different media agent, namely 144B, will convey data to tape library 108B. Disaster recovery copies created according to rule set 162 will be retained for 60 days and will be generated daily. Disaster recovery copies generated according to disaster recovery copy rule set 162 can provide protection in the event of a disaster or other catastrophic data loss that would affect the backup copy 116A maintained on disk library 108A.

Compliance copy rule set 164 is only associated with the email subclient 168, and not the file system subclient 166. Compliance copies generated according to compliance copy rule set 164 will therefore not include primary data 112A from the file system subclient 166. For instance, the organization may be under an obligation to store and maintain copies of email data for a particular period of time (e.g., 10 years) to comply with state or federal regulations, while similar regulations do not apply to file system data. Compliance copy rule set 164 is associated with the same tape library 108B and media agent 144B as disaster recovery copy rule set 162, although a different storage device or media agent could be used in other embodiments. Finally, compliance copy rule set 164 specifies that the copies it governs will be generated quarterly and retained for 10 years.

Secondary Copy Jobs

A logical grouping of secondary copy operations governed by a rule set and being initiated at a point in time may be referred to as a “secondary copy job” (and sometimes may be called a “backup job,” even though it is not necessarily limited to creating only backup copies). Secondary copy jobs may be initiated on demand as well. Steps 1-9 below illustrate three secondary copy jobs based on storage policy 148A.

Referring to FIG. 1E, at step 1, storage manager 140 initiates a backup job according to the backup copy rule set 160, which logically comprises all the secondary copy operations necessary to effectuate rules 160 in storage policy 148A every hour, including steps 1-4 occurring hourly. For instance, a scheduling service running on storage manager 140 accesses backup copy rule set 160 or a separate scheduling policy associated with client computing device 102 and initiates a backup job on an hourly basis. Thus, at the scheduled time, storage manager 140 sends instructions to client computing device 102 (i.e., to both data agent 142A and data agent 142B) to begin the backup job.

At step 2, file system data agent 142A and email data agent 142B on client computing device 102 respond to instructions from storage manager 140 by accessing and processing the respective subclient primary data 112A and 112B involved in the backup copy operation, which can be found in primary storage device 104. Because the secondary copy operation is a backup copy operation, the data agent(s) 142A, 142B may format the data into a backup format or otherwise process the data suitable for a backup copy.

At step 3, client computing device 102 communicates the processed file system data (e.g., using file system data agent 142A) and the processed email data (e.g., using email data agent 142B) to the first media agent 144A according to backup copy rule set 160, as directed by storage manager 140. Storage manager 140 may further keep a record in management database 146 of the association between media agent 144A and one or more of: client computing device 102, file system subclient 112A, file system data agent 142A, email subclient 112B, email data agent 142B, and/or backup copy 116A.

The target media agent 144A receives the data-agent-processed data from client computing device 102, and at step 4 generates and conveys backup copy 116A to disk library 108A to be stored as backup copy 116A, again at the direction of storage manager 140 and according to backup copy rule set 160. Media agent 144A can also update its index 153 to include data and/or metadata related to backup copy 116A, such as information indicating where the backup copy 116A resides on disk library 108A, where the email copy resides, where the file system copy resides, data and metadata for cache retrieval, etc. Storage manager 140 may similarly update its index 150 to include information relating to the secondary copy operation, such as information relating to the type of operation, a physical location associated with one or more copies created by the operation, the time the operation was performed, status information relating to the operation, the components involved in the operation, and the like. In some cases, storage manager 140 may update its index 150 to include some or all of the information stored in index 153 of media agent 144A. At this point, the backup job may be considered complete. After the 30-day retention period expires, storage manager 140 instructs media agent 144A to delete backup copy 116A from disk library 108A and indexes 150 and/or 153 are updated accordingly.

At step 5, storage manager 140 initiates another backup job for a disaster recovery copy according to the disaster recovery rule set 162. Illustratively this includes steps 5-7 occurring daily for creating disaster recovery copy 116B. Illustratively, and by way of illustrating the scalable aspects and off-loading principles embedded in system 100, disaster recovery copy 116B is based on backup copy 116A and not on primary data 112A and 112B.

At step 6, illustratively based on instructions received from storage manager 140 at step 5, the specified media agent 1446 retrieves the most recent backup copy 116A from disk library 108A.

At step 7, again at the direction of storage manager 140 and as specified in disaster recovery copy rule set 162, media agent 144B uses the retrieved data to create a disaster recovery copy 1166 and store it to tape library 1086. In some cases, disaster recovery copy 116B is a direct, mirror copy of backup copy 116A, and remains in the backup format. In other embodiments, disaster recovery copy 116B may be further compressed or encrypted, or may be generated in some other manner, such as by using primary data 112A and 1126 from primary storage device 104 as sources. The disaster recovery copy operation is initiated once a day and disaster recovery copies 1166 are deleted after 60 days; indexes 153 and/or 150 are updated accordingly when/after each information management operation is executed and/or completed. The present backup job may be considered completed.

At step 8, storage manager 140 initiates another backup job according to compliance rule set 164, which performs steps 8-9 quarterly to create compliance copy 116C. For instance, storage manager 140 instructs media agent 144B to create compliance copy 116C on tape library 1086, as specified in the compliance copy rule set 164.

At step 9 in the example, compliance copy 116C is generated using disaster recovery copy 1166 as the source. This is efficient, because disaster recovery copy resides on the same secondary storage device and thus no network resources are required to move the data. In other embodiments, compliance copy 116C is instead generated using primary data 112B corresponding to the email subclient or using backup copy 116A from disk library 108A as source data. As specified in the illustrated example, compliance copies 116C are created quarterly, and are deleted after ten years, and indexes 153 and/or 150 are kept up-to-date accordingly.

Exemplary Applications of Storage Policies—Information Governance Policies and Classification

Again referring to FIG. 1E, storage manager 140 may permit a user to specify aspects of storage policy 148A. For example, the storage policy can be modified to include information governance policies to define how data should be managed in order to comply with a certain regulation or business objective. The various policies may be stored, for example, in management database 146. An information governance policy may align with one or more compliance tasks that are imposed by regulations or business requirements. Examples of information governance policies might include a Sarbanes-Oxley policy, a HIPAA policy, an electronic discovery (e-discovery) policy, and so on.

Information governance policies allow administrators to obtain different perspectives on an organization's online and offline data, without the need for a dedicated data silo created solely for each different viewpoint. As described previously, the data storage systems herein build an index that reflects the contents of a distributed data set that spans numerous clients and storage devices, including both primary data and secondary copies, and online and offline copies. An organization may apply multiple information governance policies in a top-down manner over that unified data set and indexing schema in order to view and manipulate the data set through different lenses, each of which is adapted to a particular compliance or business goal. Thus, for example, by applying an e-discovery policy and a Sarbanes-Oxley policy, two different groups of users in an organization can conduct two very different analyses of the same underlying physical set of data/copies, which may be distributed throughout the information management system.

An information governance policy may comprise a classification policy, which defines a taxonomy of classification terms or tags relevant to a compliance task and/or business objective. A classification policy may also associate a defined tag with a classification rule. A classification rule defines a particular combination of criteria, such as users who have created, accessed or modified a document or data object; file or application types; content or metadata keywords; clients or storage locations; dates of data creation and/or access; review status or other status within a workflow (e.g., reviewed or un-reviewed); modification times or types of modifications; and/or any other data attributes in any combination, without limitation. A classification rule may also be defined using other classification tags in the taxonomy. The various criteria used to define a classification rule may be combined in any suitable fashion, for example, via Boolean operators, to define a complex classification rule. As an example, an e-discovery classification policy might define a classification tag “privileged” that is associated with documents or data objects that (1) were created or modified by legal department staff, or (2) were sent to or received from outside counsel via email, or (3) contain one of the following keywords: “privileged” or “attorney” or “counsel,” or other like terms. Accordingly, all these documents or data objects will be classified as “privileged.”

One specific type of classification tag, which may be added to an index at the time of indexing, is an “entity tag.” An entity tag may be, for example, any content that matches a defined data mask format. Examples of entity tags might include, e.g., social security numbers (e.g., any numerical content matching the formatting mask XXX-XX-XXXX), credit card numbers (e.g., content having a 13-16 digit string of numbers), SKU numbers, product numbers, etc. A user may define a classification policy by indicating criteria, parameters or descriptors of the policy via a graphical user interface, such as a form or page with fields to be filled in, pull-down menus or entries allowing one or more of several options to be selected, buttons, sliders, hypertext links or other known user interface tools for receiving user input, etc. For example, a user may define certain entity tags, such as a particular product number or project ID. In some implementations, the classification policy can be implemented using cloud-based techniques. For example, the storage devices may be cloud storage devices, and the storage manager 140 may execute cloud service provider API over a network to classify data stored on cloud storage devices.

Restore Operations from Secondary Copies

While not shown in FIG. 1E, at some later point in time, a restore operation can be initiated involving one or more of secondary copies 116A, 116B, and 116C. A restore operation logically takes a selected secondary copy 116, reverses the effects of the secondary copy operation that created it, and stores the restored data to primary storage where a client computing device 102 may properly access it as primary data. A media agent 144 and an appropriate data agent 142 (e.g., executing on the client computing device 102) perform the tasks needed to complete a restore operation. For example, data that was encrypted, compressed, and/or deduplicated in the creation of secondary copy 116 will be correspondingly rehydrated (reversing deduplication), uncompressed, and unencrypted into a format appropriate to primary data. Metadata stored within or associated with the secondary copy 116 may be used during the restore operation. In general, restored data should be indistinguishable from other primary data 112. Preferably, the restored data has fully regained the native format that may make it immediately usable by application 110.

As one example, a user may manually initiate a restore of backup copy 116A, e.g., by interacting with user interface 158 of storage manager 140 or with a web-based console with access to system 100. Storage manager 140 may accesses data in its index 150 and/or management database 146 (and/or the respective storage policy 148A) associated with the selected backup copy 116A to identify the appropriate media agent 144A and/or secondary storage device 108A where the secondary copy resides. The user may be presented with a representation (e.g., stub, thumbnail, listing, etc.) and metadata about the selected secondary copy, in order to determine whether this is the appropriate copy to be restored, e.g., date that the original primary data was created. Storage manager 140 will then instruct media agent 144A and an appropriate data agent 142 on the target client computing device 102 to restore secondary copy 116A to primary storage device 104. A media agent may be selected for use in the restore operation based on a load balancing algorithm, an availability based algorithm, or other criteria. The selected media agent, e.g., 144A, retrieves secondary copy 116A from disk library 108A. For instance, media agent 144A may access its index 153 to identify a location of backup copy 116A on disk library 108A, or may access location information residing on disk library 108A itself.

In some cases a backup copy 116A that was recently created or accessed, may be cached to speed up the restore operation. In such a case, media agent 144A accesses a cached version of backup copy 116A residing in index 153, without having to access disk library 108A for some or all of the data. Once it has retrieved backup copy 116A, the media agent 144A communicates the data to the requesting client computing device 102. Upon receipt, file system data agent 142A and email data agent 142B may unpack (e.g., restore from a backup format to the native application format) the data in backup copy 116A and restore the unpackaged data to primary storage device 104. In general, secondary copies 116 may be restored to the same volume or folder in primary storage device 104 from which the secondary copy was derived; to another storage location or client computing device 102; to shared storage, etc. In some cases, the data may be restored so that it may be used by an application 110 of a different version/vintage from the application that created the original primary data 112.

Exemplary Secondary Copy Formatting

The formatting and structure of secondary copies 116 can vary depending on the embodiment. In some cases, secondary copies 116 are formatted as a series of logical data units or “chunks” (e.g., 512 MB, 1 GB, 2 GB, 4 GB, or 8 GB chunks). This can facilitate efficient communication and writing to secondary storage devices 108, e.g., according to resource availability. For example, a single secondary copy 116 may be written on a chunk-by-chunk basis to one or more secondary storage devices 108. In some cases, users can select different chunk sizes, e.g., to improve throughput to tape storage devices. Generally, each chunk can include a header and a payload. The payload can include files (or other data units) or subsets thereof included in the chunk, whereas the chunk header generally includes metadata relating to the chunk, some or all of which may be derived from the payload. For example, during a secondary copy operation, media agent 144, storage manager 140, or other component may divide files into chunks and generate headers for each chunk by processing the files. Headers can include a variety of information such as file and/or volume identifier(s), offset(s), and/or other information associated with the payload data items, a chunk sequence number, etc. Importantly, in addition to being stored with secondary copy 116 on secondary storage device 108, chunk headers can also be stored to index 153 of the associated media agent(s) 144 and/or to index 150 associated with storage manager 140. This can be useful for providing faster processing of secondary copies 116 during browsing, restores, or other operations. In some cases, once a chunk is successfully transferred to a secondary storage device 108, the secondary storage device 108 returns an indication of receipt, e.g., to media agent 144 and/or storage manager 140, which may update their respective indexes 153, 150 accordingly. During restore, chunks may be processed (e.g., by media agent 144) according to the information in the chunk header to reassemble the files.

Data can also be communicated within system 100 in data channels that connect client computing devices 102 to secondary storage devices 108. These data channels can be referred to as “data streams,” and multiple data streams can be employed to parallelize an information management operation, improving data transfer rate, among other advantages. Example data formatting techniques including techniques involving data streaming, chunking, and the use of other data structures in creating secondary copies are described in U.S. Pat. Nos. 7,315,923, 8,156,086, and 8,578,120.

FIGS. 1F and 1G are diagrams of example data streams 170 and 171, respectively, which may be employed for performing information management operations. Referring to FIG. 1F, data agent 142 forms data stream 170 from source data associated with a client computing device 102 (e.g., primary data 112). Data stream 170 is composed of multiple pairs of stream header 172 and stream data (or stream payload) 174. Data streams 170 and 171 shown in the illustrated example are for a single-instanced storage operation, and a stream payload 174 therefore may include both single-instance (SI) data and/or non-SI data. A stream header 172 includes metadata about the stream payload 174. This metadata may include, for example, a length of the stream payload 174, an indication of whether the stream payload 174 is encrypted, an indication of whether the stream payload 174 is compressed, an archive file identifier (ID), an indication of whether the stream payload 174 is single instanceable, and an indication of whether the stream payload 174 is a start of a block of data.

Referring to FIG. 1G, data stream 171 has the stream header 172 and stream payload 174 aligned into multiple data blocks. In this example, the data blocks are of size 64 KB. The first two stream header 172 and stream payload 174 pairs comprise a first data block of size 64 KB. The first stream header 172 indicates that the length of the succeeding stream payload 174 is 63 KB and that it is the start of a data block. The next stream header 172 indicates that the succeeding stream payload 174 has a length of 1 KB and that it is not the start of a new data block. Immediately following stream payload 174 is a pair comprising an identifier header 176 and identifier data 178. The identifier header 176 includes an indication that the succeeding identifier data 178 includes the identifier for the immediately previous data block. The identifier data 178 includes the identifier that the data agent 142 generated for the data block. The data stream 171 also includes other stream header 172 and stream payload 174 pairs, which may be for SI data and/or non-SI data.

FIG. 1H is a diagram illustrating data structures 180 that may be used to store blocks of SI data and non-SI data on a storage device (e.g., secondary storage device 108). According to certain embodiments, data structures 180 do not form part of a native file system of the storage device. Data structures 180 include one or more volume folders 182, one or more chunk folders 184/185 within the volume folder 182, and multiple files within chunk folder 184. Each chunk folder 184/185 includes a metadata file 186/187, a metadata index file 188/189, one or more container files 190/191/193, and a container index file 192/194. Metadata file 186/187 stores non-SI data blocks as well as links to SI data blocks stored in container files. Metadata index file 188/189 stores an index to the data in the metadata file 186/187. Container files 190/191/193 store SI data blocks. Container index file 192/194 stores an index to container files 190/191/193. Among other things, container index file 192/194 stores an indication of whether a corresponding block in a container file 190/191/193 is referred to by a link in a metadata file 186/187. For example, data block B2 in the container file 190 is referred to by a link in metadata file 187 in chunk folder 185. Accordingly, the corresponding index entry in container index file 192 indicates that data block B2 in container file 190 is referred to. As another example, data block B1 in container file 191 is referred to by a link in metadata file 187, and so the corresponding index entry in container index file 192 indicates that this data block is referred to.

As an example, data structures 180 illustrated in FIG. 1H may have been created as a result of separate secondary copy operations involving two client computing devices 102. For example, a first secondary copy operation on a first client computing device 102 could result in the creation of the first chunk folder 184, and a second secondary copy operation on a second client computing device 102 could result in the creation of the second chunk folder 185. Container files 190/191 in the first chunk folder 184 would contain the blocks of SI data of the first client computing device 102. If the two client computing devices 102 have substantially similar data, the second secondary copy operation on the data of the second client computing device 102 would result in media agent 144 storing primarily links to the data blocks of the first client computing device 102 that are already stored in the container files 190/191. Accordingly, while a first secondary copy operation may result in storing nearly all of the data subject to the operation, subsequent secondary storage operations involving similar data may result in substantial data storage space savings, because links to already stored data blocks can be stored instead of additional instances of data blocks.

If the operating system of the secondary storage computing device 106 on which media agent 144 operates supports sparse files, then when media agent 144 creates container files 190/191/193, it can create them as sparse files. A sparse file is a type of file that may include empty space (e.g., a sparse file may have real data within it, such as at the beginning of the file and/or at the end of the file, but may also have empty space in it that is not storing actual data, such as a contiguous range of bytes all having a value of zero). Having container files 190/191/193 be sparse files allows media agent 144 to free up space in container files 190/191/193 when blocks of data in container files 190/191/193 no longer need to be stored on the storage devices. In some examples, media agent 144 creates a new container file 190/191/193 when a container file 190/191/193 either includes 100 blocks of data or when the size of the container file 190 exceeds 50 MB. In other examples, media agent 144 creates a new container file 190/191/193 when a container file 190/191/193 satisfies other criteria (e.g., it contains from approx. 100 to approx. 1000 blocks or when its size exceeds approximately 50 MB to 1 GB). In some cases, a file on which a secondary copy operation is performed may comprise a large number of data blocks. For example, a 100 MB file may comprise 400 data blocks of size 256 KB. If such a file is to be stored, its data blocks may span more than one container file, or even more than one chunk folder. As another example, a database file of 20 GB may comprise over 40,000 data blocks of size 512 KB. If such a database file is to be stored, its data blocks will likely span multiple container files, multiple chunk folders, and potentially multiple volume folders. Restoring such files may require accessing multiple container files, chunk folders, and/or volume folders to obtain the requisite data blocks.

Using Backup Data for Replication and Disaster Recovery (“Live Synchronization”)

There is an increased demand to off-load resource intensive information management tasks (e.g., data replication tasks) away from production devices (e.g., physical or virtual client computing devices) in order to maximize production efficiency. At the same time, enterprises expect access to readily-available up-to-date recovery copies in the event of failure, with little or no production downtime.

FIG. 2A illustrates a system 200 configured to address these and other issues by using backup or other secondary copy data to synchronize a source subsystem 201 (e.g., a production site) with a destination subsystem 203 (e.g., a failover site). Such a technique can be referred to as “live synchronization” and/or “live synchronization replication.” In the illustrated embodiment, the source client computing devices 202 a include one or more virtual machines (or “VMs”) executing on one or more corresponding VM host computers 205 a, though the source need not be virtualized. The destination site 203 may be at a location that is remote from the production site 201, or may be located in the same data center, without limitation. One or more of the production site 201 and destination site 203 may reside at data centers at known geographic locations, or alternatively may operate “in the cloud.”

The synchronization can be achieved by generally applying an ongoing stream of incremental backups from the source subsystem 201 to the destination subsystem 203, such as according to what can be referred to as an “incremental forever” approach. FIG. 2A illustrates an embodiment of a data flow which may be orchestrated at the direction of one or more storage managers (not shown). At step 1, the source data agent(s) 242 a and source media agent(s) 244 a work together to write backup or other secondary copies of the primary data generated by the source client computing devices 202 a into the source secondary storage device(s) 208 a. At step 2, the backup/secondary copies are retrieved by the source media agent(s) 244 a from secondary storage. At step 3, source media agent(s) 244 a communicate the backup/secondary copies across a network to the destination media agent(s) 244 b in destination subsystem 203.

As shown, the data can be copied from source to destination in an incremental fashion, such that only changed blocks are transmitted, and in some cases multiple incremental backups are consolidated at the source so that only the most current changed blocks are transmitted to and applied at the destination. An example of live synchronization of virtual machines using the “incremental forever” approach is found in U.S. Patent Application No. 62/265,339 entitled “Live Synchronization and Management of Virtual Machines across Computing and Virtualization Platforms and Using Live Synchronization to Support Disaster Recovery.” Moreover, a deduplicated copy can be employed to further reduce network traffic from source to destination. For instance, the system can utilize the deduplicated copy techniques described in U.S. Pat. No. 9,239,687, entitled “Systems and Methods for Retaining and Using Data Block Signatures in Data Protection Operations.”

At step 4, destination media agent(s) 244 b write the received backup/secondary copy data to the destination secondary storage device(s) 208 b. At step 5, the synchronization is completed when the destination media agent(s) and destination data agent(s) 242 b restore the backup/secondary copy data to the destination client computing device(s) 202 b. The destination client computing device(s) 202 b may be kept “warm” awaiting activation in case failure is detected at the source. This synchronization/replication process can incorporate the techniques described in U.S. patent application Ser. No. 14/721,971, entitled “Replication Using Deduplicated Secondary Copy Data.”

Where the incremental backups are applied on a frequent, on-going basis, the synchronized copies can be viewed as mirror or replication copies. Moreover, by applying the incremental backups to the destination site 203 using backup or other secondary copy data, the production site 201 is not burdened with the synchronization operations. Because the destination site 203 can be maintained in a synchronized “warm” state, the downtime for switching over from the production site 201 to the destination site 203 is substantially less than with a typical restore from secondary storage. Thus, the production site 201 may flexibly and efficiently fail over, with minimal downtime and with relatively up-to-date data, to a destination site 203, such as a cloud-based failover site. The destination site 203 can later be reverse synchronized back to the production site 201, such as after repairs have been implemented or after the failure has passed.

Integrating with the Cloud Using File System Protocols

Given the ubiquity of cloud computing, it can be increasingly useful to provide data protection and other information management services in a scalable, transparent, and highly plug-able fashion. FIG. 2B illustrates an information management system 200 having an architecture that provides such advantages, and incorporates use of a standard file system protocol between primary and secondary storage subsystems 217, 218. As shown, the use of the network file system (NFS) protocol (or any another appropriate file system protocol such as that of the Common Internet File System (CIFS)) allows data agent 242 to be moved from the primary storage subsystem 217 to the secondary storage subsystem 218. For instance, as indicated by the dashed box 206 around data agent 242 and media agent 244, data agent 242 can co-reside with media agent 244 on the same server (e.g., a secondary storage computing device such as component 106), or in some other location in secondary storage subsystem 218.

Where NFS is used, for example, secondary storage subsystem 218 allocates an NFS network path to the client computing device 202 or to one or more target applications 210 running on client computing device 202. During a backup or other secondary copy operation, the client computing device 202 mounts the designated NFS path and writes data to that NFS path. The NFS path may be obtained from NFS path data 215 stored locally at the client computing device 202, and which may be a copy of or otherwise derived from NFS path data 219 stored in the secondary storage subsystem 218.

Write requests issued by client computing device(s) 202 are received by data agent 242 in secondary storage subsystem 218, which translates the requests and works in conjunction with media agent 244 to process and write data to a secondary storage device(s) 208, thereby creating a backup or other secondary copy. Storage manager 240 can include a pseudo-client manager 217, which coordinates the process by, among other things, communicating information relating to client computing device 202 and application 210 (e.g., application type, client computing device identifier, etc.) to data agent 242, obtaining appropriate NFS path data from the data agent 242 (e.g., NFS path information), and delivering such data to client computing device 202.

Conversely, during a restore or recovery operation client computing device 202 reads from the designated NFS network path, and the read request is translated by data agent 242. The data agent 242 then works with media agent 244 to retrieve, re-process (e.g., re-hydrate, decompress, decrypt), and forward the requested data to client computing device 202 using NFS.

By moving specialized software associated with system 200 such as data agent 242 off the client computing devices 202, the illustrative architecture effectively decouples the client computing devices 202 from the installed components of system 200, improving both scalability and plug-ability of system 200. Indeed, the secondary storage subsystem 218 in such environments can be treated simply as a read/write NFS target for primary storage subsystem 217, without the need for information management software to be installed on client computing devices 202. As one example, an enterprise implementing a cloud production computing environment can add VM client computing devices 202 without installing and configuring specialized information management software on these VMs. Rather, backups and restores are achieved transparently, where the new VMs simply write to and read from the designated NFS path. An example of integrating with the cloud using file system protocols or so-called “infinite backup” using NFS share is found in U.S. Patent Application No. 62/294,920, entitled “Data Protection Operations Based on Network Path Information.” Examples of improved data restoration scenarios based on network-path information, including using stored backups effectively as primary data sources, may be found in U.S. Patent Application No. 62/297,057, entitled “Data Restoration Operations Based on Network Path Information.”

Highly Scalable Managed Data Pool Architecture

Enterprises are seeing explosive data growth in recent years, often from various applications running in geographically distributed locations. FIG. 2C shows a block diagram of an example of a highly scalable, managed data pool architecture useful in accommodating such data growth. The illustrated system 200, which may be referred to as a “web-scale” architecture according to certain embodiments, can be readily incorporated into both open compute/storage and common-cloud architectures.

The illustrated system 200 includes a grid 245 of media agents 244 logically organized into a control tier 231 and a secondary or storage tier 233. Media agents assigned to the storage tier 233 can be configured to manage a secondary storage pool 208 as a deduplication store, and be configured to receive client write and read requests from the primary storage subsystem 217, and direct those requests to the secondary tier 233 for servicing. For instance, media agents CMA1-CMA3 in the control tier 231 maintain and consult one or more deduplication databases 247, which can include deduplication information (e.g., data block hashes, data block links, file containers for deduplicated files, etc.) sufficient to read deduplicated files from secondary storage pool 208 and write deduplicated files to secondary storage pool 208. For instance, system 200 can incorporate any of the deduplication systems and methods shown and described in U.S. Pat. No. 9,020,900, entitled “Distributed Deduplicated Storage System,” and U.S. Pat. Pub. No. 2014/0201170, entitled “High Availability Distributed Deduplicated Storage System.”

Media agents SMA1-SMA6 assigned to the secondary tier 233 receive write and read requests from media agents CMA1-CMA3 in control tier 231, and access secondary storage pool 208 to service those requests. Media agents CMA1-CMA3 in control tier 231 can also communicate with secondary storage pool 208, and may execute read and write requests themselves (e.g., in response to requests from other control media agents CMA1-CMA3) in addition to issuing requests to media agents in secondary tier 233. Moreover, while shown as separate from the secondary storage pool 208, deduplication database(s) 247 can in some cases reside in storage devices in secondary storage pool 208.

As shown, each of the media agents 244 (e.g., CMA1-CMA3, SMA1-SMA6, etc.) in grid 245 can be allocated a corresponding dedicated partition 251A-2511, respectively, in secondary storage pool 208. Each partition 251 can include a first portion 253 containing data associated with (e.g., stored by) media agent 244 corresponding to the respective partition 251. System 200 can also implement a desired level of replication, thereby providing redundancy in the event of a failure of a media agent 244 in grid 245. Along these lines, each partition 251 can further include a second portion 255 storing one or more replication copies of the data associated with one or more other media agents 244 in the grid.

System 200 can also be configured to allow for seamless addition of media agents 244 to grid 245 via automatic configuration. As one illustrative example, a storage manager (not shown) or other appropriate component may determine that it is appropriate to add an additional node to control tier 231, and perform some or all of the following: (i) assess the capabilities of a newly added or otherwise available computing device as satisfying a minimum criteria to be configured as or hosting a media agent in control tier 231; (ii) confirm that a sufficient amount of the appropriate type of storage exists to support an additional node in control tier 231 (e.g., enough disk drive capacity exists in storage pool 208 to support an additional deduplication database 247); (iii) install appropriate media agent software on the computing device and configure the computing device according to a pre-determined template; (iv) establish a partition 251 in the storage pool 208 dedicated to the newly established media agent 244; and (v) build any appropriate data structures (e.g., an instance of deduplication database 247). An example of highly scalable managed data pool architecture or so-called web-scale architecture for storage and data management is found in U.S. Patent Application No. 62/273,286 entitled “Redundant and Robust Distributed Deduplication Data Storage System.”

The embodiments and components thereof disclosed in FIGS. 2A, 2B, and 2C, as well as those in FIGS. 1A-1H, may be implemented in any combination and permutation to satisfy data storage management and information management needs at one or more locations and/or data centers.

Dynamically Configuring a Proxy Server Using Software-Containerization for Concurrent and/or Overlapping Backup, Restore, and/or Test Operations

By using the illustrative data storage management system which takes advantage of software containerization techniques, a single proxy server (e.g., 322) can be dynamically configured as needed to support any number of concurrent and/or overlapping storage and/or testing operations relative to database management systems (DBMSs) in a data network. Illustratively, enhanced storage management components, e.g., storage manager 340, data agents 542, media agents 544, and a specially configured proxy server 322, interoperate to enable concurrent and/or overlapping operations that are not encumbered by namespace restrictions. By using software containers that operate independently of each other on the same proxy server, storage operations and/or testing can be executed in each respective software container without regard to what other software containers are doing at the same time. Moreover, the software container-based operations on the proxy server occur without involving any of the DBMS production servers 302 that use and generate “live” database data (e.g., 112). Thus, the illustrative proxy server 322 and the techniques associated with it insulate the DBMS production environment from the testing and storage operations hosted by the proxy server.

An illustrative data storage management system relies on the specially configured proxy server 322, illustratively using proxy control logic 324 for a variety of functions, including to operate the software containers, to maintain certain resources needed by the software containers, and to interwork with other components of the data storage management system, such as the storage manager, primary and secondary data storage devices, index server(s), and client computing devices. See, e.g., FIGS. 5A and 6. Illustratively, a catalog service 538 that runs on proxy server 322 comprises maintenance rules 536, maintains a software cache 532 according to the rules, and also maintains an associated cache catalog 534 on the proxy server. The software containers 323 are generally managed and operated by an illustrative container manager 530 also hosted by proxy server 322. See, e.g., FIGS. 3-5B.

The illustrative software contents of software cache 532 are resources needed by software containers 323, such as pre-configured container templates 525, DBMS software components 521 (e.g., executable files, library files, configuration files, etc.), so-called lightervisors 523 representing target operating systems, and storage management software executables 527 (e.g., data agents, media agents) for performing test and storage operations. The maintenance rules 536 in catalog service 538 govern when contents of software cache 532 should be purged, such as by moving the contents offline into archive copies on secondary storage from where they can be retrieved when needed, e.g., archiving an older version of DBMS software 521 or storage management software 527 that is only rarely used. The illustrative cache catalog 534 comprises an index of the contents of software cache 532, including a record of whether cache contents are fully present in the software cache or have been archived and are represented only by a corresponding stub, and also a timestamp of when each content element was last used in a software container. The cache catalogue 534 is kept current by the illustrative catalog service 538 entering updates therein whenever a software cache content element (e.g., 521, 523, 525, and/or 527) is used and/or added and/or archived. The illustrative catalog service 538 also reports cache catalog changes to an index server that illustratively operates in the data storage management system and which comprises diverse indexed information collected throughout the system.

FIG. 3 is a block diagram depicting an illustrative data storage management system 300 for using software containerization to dynamically configure a proxy server for concurrent and/or overlapping storage operations (e.g., backup, restore, etc.) and/or test operations for database management systems (DBMSs), according to an illustrative embodiment of the present invention. Illustratively, system 300 comprises: data storage device 104; secondary storage computing device 106; data storage device 108; production servers 302 (e.g., 302-1 . . . 302-M); proxy server 322 comprising containers 323 (e.g., 323-1 . . . 323-J), and proxy control logic 324; storage manager 340 comprising management database 146; and index server 350. The components are communicatively coupled as shown by the arrows. Any suitable electronic communications infrastructure supports these communication pathways, whether direct or indirect, for example as described above in regard to communication pathways 114. Although not shown here, it is to be understood that storage manager 340 is in communication with media agent 144 executing on secondary storage computing device 106 and with data agents 142 executing on the respective production DB servers 302 using communication pathways 114 (not shown here). Some of the details provided in FIG. 3 are left out of the present figure for simplicity, but are understood to be part of the depicted embodiment, e.g., any number of production DB servers 302, primary data storage devices 104, secondary storage computing devices 106, and secondary data storage devices 108, without limitation.

Data storage device 104 was described in more detail above. In the illustrative embodiment, data storage device 104 is a storage array that supports hardware snapshots and snapshot cloning, though the invention is not so limited. In regard to the production environment, data storage device 104 stores primary data sources, e.g., database DB1 112-1 (FIG. 4), that are accessible to DBMS software, e.g., 110 (FIG. 4), executing on a production server 302, so that each data source is read and written by the corresponding DBMS software.

Secondary storage computing device 106 was described in more detail above. In the illustrative embodiment, this device hosts one or more media agents 144, each respective media agent being associated and in communication with one or more data storage devices, such as storage array 104.

Data storage device 108 was described in more detail above. In the illustrative embodiment, this device stores secondary copies of various kinds, e.g., backup and/or archive copies of databases 116; backup and/or archive copies of software-container templates 535; backup and/or archive copies of DBMS software 531; backup and/or archive copies of lightervisors (not shown); backup and/or archive copies of storage management software versions (not shown), such as storage management software provided by Commvault Systems, Inc. of Tinton Falls, N.J., USA. See, e.g., FIG. 5A.

Production database servers 302 (e.g., 302-1 . . . 302-M) are computing devices analogous to client computing device 102 and further host DBMS software applications 110 (e.g., DBMS 1, DBMS 2, etc.) and data agent(s) 142 respectively associated therewith. Servers 302 are part of a “live” production environment, i.e., performing business operations for the enterprise. In the illustrative embodiment, servers 302 perform database transactions using the respective DBMS software 110 being hosted, e.g., DBMS 1, DBMS 2, etc. A database management system (DBMS) is generally embodied as computer software that interacts with primary data which is in the form of a database (e.g., DB1 112-1), and the DBMS may generate new primary data, may change or delete the primary data, may analyze the primary data (e.g., responding to queries, issuing reports, etc.), as well as managing the integrity of the data in the database 112. The DBMS software 110 executes on a computing device, such as production database server 302 or proxy server 322. The database (e.g., 112) is generally stored in associated primary storage, such as storage array 104. Examples of database management systems include Oracle, IBM DB2, Sybase, MySQL, PostgreSQL, Microsoft SQL Server, SAP HANA, etc., without limitation. The associated data agent 142, is illustratively provided by Commvault Systems, Inc. of Tinton Falls, N.J., USA, and is generally configured to be knowledgeable about and compatible with the associated DBMS, e.g., Oracle data agent, DB2 data agent, DB2 MultiNode data agent, etc. Data agents 142 are application aware and comprise special-purpose functionality, such as the ability to quiesce a DBMS software and/or its associated database in order to launch a storage operation, such as a backup, archive, restore, etc. Data agents 142 also understand other parameters specific to the associated DBMS, such as software executable files (binary files), associated library files, configuration files, location of software executables, naming conventions, data structures, etc.

Proxy server 322 is a computing device specially configured for hosting software containers for testing and storage operations, which may at times run concurrently or overlappingly with each other by using software containers. In contrast to production servers 302, proxy server 322 is not part of the live production environment that includes servers 302. Instead, one or more proxy servers 322 are part of a secondary storage subsystem 118, and they are involved in performing storage and testing operations outside the live production sphere. Proxy server 322 comprises one or more central data processing units (CPU) and/or computing cores, as well as corresponding associated computer main memory (RAM) for executing proxy control logic 324 and further for executing any number of containers 323. Proxy server 322 also illustratively comprises mass storage for storing software cache 532 and cache catalog 534 (see, e.g., FIG. 5A). Proxy server 322 is said to be dynamically configurable by activating and deactivating containers 323. Thus, whether on demand as instructed by storage manager 340 or on a pre-defined schedule (not shown), a software container 323 is activated on proxy server 322 and executes one or more operations, e.g., establishing a testbed for a DBMS, backing up a database, restoring a database from a secondary copy 116, reporting on storage management operations, etc., and on completion the container is destroyed and functionally disappears from the proxy server.

Software containers 323 (or “containers 323”) (e.g., 323-1 . . . 323-J) are a form of computing virtualization technology that is well known in the art. In general terms, a software container consists of an entire runtime environment, which includes: an application, plus all its dependencies, libraries and other binaries, and configuration files needed to run it, bundled into one package. By containerizing the application platform and its dependencies, differences in operating systems and underlying infrastructure are abstracted away. The host (here proxy server 322) runs a single underlying operating system, not a hypervisor, and each software container 323 shares (read-only) the operating system kernel with the other active software containers 323. Software containers may be much smaller in size than virtual machines, which require their own complete operating system plus the underlying hypervisor. Docker provides commonly used software container technology, but other providers are in the market as well.

According to the illustrative embodiment, a software container 323 comprises elements such that, when the software container is activated, the elements are instantiated and execute on the underlying host (e.g., proxy server 322) in a user space instance apart from other user space instances created by other co-existing containers 323 that are actively operating on the same host (proxy server 322). Although the general concept of software containers is well known in the art, the present software containers 323 are defined and designed to perform storage operations and the related DBMS testing operations described herein. Accordingly, the contents of software containers 323 include not only application software in the form of DBMS software 521, but also storage management software 527, which provides storage management components such as data agents 142 and media agents 144 for performing storage/test operations using the software containers.

Software containers 323 are generally managed by proxy control logic 324, which is described in further detail in a subsequent figure. Furthermore, the storage operations performed with each particular software container 323 are managed in some embodiments by subcomponents of proxy control logic 324 and in other embodiments by storage manager 340 as described in further detail below. A given container 323 comprises certain elements that are needed by the disclosed storage/test operations, including a DBMS software instance, a data agent instance, a media agent instance, and an appropriate target operating system (see, e.g., FIG. 5B for details), and is connected to a database data source, which may be on storage array 104 or secondary storage device 108. Because containers 323 operate mutually independently of one another, the operations of one container 323 occur asynchronously relative to another container 323, thus enabling concurrent and/or overlapping operations to take place on multiple containers on proxy server 322. As illustrated in the present figure, proxy server 322 is able to host concurrent and/or overlapping operations for the same and/or diverse DBMS software and database data sources. There is no limit on the number of containers 323 that can be activated and operational at any given time on proxy server 322.

Proxy control logic 324 represents a collection of functional components and data structures configured on proxy server 322 that collectively control and manage software containers 323 on proxy server 322. More details are given in subsequent figures. Examples of some of the functionality provided by proxy control logic 324, including its illustrative subcomponents, include one or more of the following without limitation:

-   -   Receiving instructions (e.g., messages, settings, operational         parameters, etc.) from storage manager 340 such as instructions         to create a suitable container 323 for executing a certain DBMS         software 521/531; to obtain a suitable container 323 from a         pre-existing template 525/535; to mount suitable logical storage         (volumes on storage array 104) to the container for access to         data therein; to activate the container and execute the         components therein; to deactivate and/or uninstall the         container; to make a copy of a newly created container and save         it elsewhere as a template;     -   When creating a container 323, establishing settings to the         storage management components therein (e.g., data agent 142,         media agent 144) that identify the storage manager 340 that is         configured to manage the storage/test operations that the         container components (or constituent elements) are to         participate in;     -   Receiving instructions from storage manager 340 to prepare         server 322 for storage operations;     -   Receiving instructions from storage manager 340 to prepare a         DBMS testbed on server 322;     -   Determining and identifying a suitable container template, e.g.,         525, 535;     -   For a testing operation, determining whether the data source is         an existing DB snapshot 414, clone 315, or a secondary copy 116,         and identifying a suitable media agent 144 with access to the         secondary storage device 108 that stores the secondary copy 116;     -   Determining an appropriate data agent 142 to activate in a         container for a given DBMS type/vendor, version, etc. from the         data agents available in storage management software 527;     -   Tracking and maintaining records of what is/was happening on         proxy server 322, e.g., active containers, DBMS instance         identifiers, data agent identifiers, media agent identifiers and         associated secondary storage; storage operations and/or testing;         inactive containers configured on proxy server 322 but not         operating; activity markers, such as duration of active         container operation, associated DBMS identifiers, operations         performed by the container, etc.; this includes maintaining data         structure(s) on proxy server 322 for storing said tracking data         (not shown);     -   Generating and storing reports based on tracking information,         e.g., daily activity report, which are illustratively         transmitted to storage manager 340;     -   Communicating to and from storage manager 340 to receive         instructions and to transmit reporting about past and present         operations, including reporting based on tracking/report         features listed above;     -   Communicating to and from other components, such as an index         server 350, and/or a report server (not shown) for receiving         instructions to generate reports and for transmitting said         reports and/or other raw data (e.g., tracking information)         thereto; illustratively, raw tracking data is transmitted to a         report server, which generates user-friendly reports for user         consumption.

Storage manager 340 illustratively comprises management database 146 (and in alternative embodiments being associated with but not comprising management database 146). Storage manager 340 is analogous to storage manager 140 and further comprises enhanced features for operating in system 300, including without limitation the ability to communicate with proxy server 322 and to manage storage/test operations in containers 323 executing thereon.

When it executes according to an illustrative embodiment, storage manager 340 is responsible for one or more of the following functionality without limitation:

-   -   Instructing data agents 142 (on production servers 302) and         media agent(s) 144 (on secondary storage computing device(s)         106) to generate and/or cause the creation of snapshots 414 and         416 stored to storage array 104;     -   Instructing media agents 144 (on secondary storage computing         device(s) 106) to cause storage array 104 to create clones 415         and 417;     -   Tracking logical volumes on storage array 104, e.g., volumes         that comprise clones 415 and 417;     -   Transmitting instructions (e.g., messages, settings, parameters,         etc.) to proxy control logic 324 (or a subcomponent thereof) to         perform certain storage operation(s) and/or test operations; the         parameters for the operation(s) are one or more of: a version of         DBMS software; a database data source; a destination; a target         operating system, a version of storage management software or         data agent or media agent to use in the operation(s), and/or an         identification of a pre-existing container template;     -   Transmitting instructions to proxy control logic 324 (or a         subcomponent thereof) to prepare proxy server 322 for storage         operations, e.g., making secondary copy(ies) 116, restore,         index, report, etc.; and receiving client registration from an         activated data agent 542;     -   Transmitting instructions to proxy control logic 324 (or a         subcomponent thereof) to prepare a DBMS testbed on proxy server         322 for testing a DBMS; and receiving client registration from         an activated data agent 542;     -   Determining and identifying a suitable container template 525,         based on DBMS attributes such as type/vendor, version number,         database name, data source identifier, operation, etc.—for         example, using these parameters to identify a suitable data         agent 142 from storage management software 527 to be activated         in the container, and transmitting said template identifier to         proxy control logic 324 (or a subcomponent thereof);     -   Based on the type of storage operation and/or destination of         secondary copies to be generated, determining and identifying a         suitable container template 525, including identifying a         suitable media agent 144 from storage management software 527         with access to suitable secondary storage 108, and transmitting         said media agent identifier to proxy control logic 324 (or a         subcomponent thereof);     -   For a testing operation, determining whether the data source is         an existing DB snapshot 414 or clone 415 or a secondary copy         116, and identifying a suitable media agent 144 with access to         the secondary storage device 108 that stores the secondary copy         116, and transmitting said identifiers and operational         parameters to proxy control logic 324 (or a subcomponent         thereof);     -   Determining an appropriate data agent 142 to populate in a         container 323 for a given DBMS type/vendor, version, etc. and         transmitting said identifier to proxy control logic 324 (or a         subcomponent thereof);     -   Receiving registrations from activated data agents 142 and media         agents 144 in an activated container 323 and managing storage         and test operations occurring in the respective container using         the respective data agent 142 and media agent 144;     -   Communicating to and from proxy control logic 324 (or a         subcomponent thereof) to transmit instructions and to receive         reporting about past and present operations based on         tracking/report features listed above in regard to proxy control         logic 324 (or a subcomponent thereof);     -   Communicating to and from other components, such as index server         350, and/or a report server (not shown) for transmitting thereto         raw data and reports received by storage manager 340 from proxy         control logic 324 (or a subcomponent thereof);     -   Using tracking and/or reporting information received from proxy         control logic 324 (or a subcomponent thereof) to generate         reports for user consumption regarding container operations and         storage/test operations on proxy server 322;     -   Etc., without limitation.

As is evident from the illustrative (and not limiting) enumeration of functionality above, one or more of the enumerated features above can be performed by proxy control logic 324 (or a subcomponent thereof), storage manager 340, or a combination thereof, depending on the chosen embodiment. Illustrative details on the functionality of proxy control logic 324 are given in subsequent figures. Other embodiments will become evident to a person having ordinary skill in the art after reading the present disclosure and understanding the accompanying figures.

Index server 350 is a computing device, a component of data storage management system 300, that stores diverse information gleaned and collected from data storage management system 300. For example, index server 350 serves as a repository of media agent indexes 153; collects updates from cache catalog 534, etc.

Data storage management system 300 is not limited to the configuration depicted in the present figure, and other configurations are possible that include any number of the depicted components, e.g., several proxy servers 322, multiple storage arrays 104, multiple secondary storage devices 108, etc., without limitation.

FIG. 4 is a block diagram depicting further detail of certain components of system 300. Illustratively, secondary storage computing device 106 hosts a media agent 144; production server 302 (e.g., 302-1) hosts DBMS 1 software 110, associated data agent 142, and discovery module 442; primary storage device (storage array) 104 comprises database primary data DB1 112-1, DB1 snapshot 414-1, DB1 snapshot clone 415-1, DBMS 1 software “home” snapshot 416-1, and DBMS 1 “home” clone 417-1, and other data; and proxy server 322 hosts proxy control logic 324 and any number of software containers 323 (e.g., 323-1 . . . 323-J). Communication pathways among the illustrative components are depicted by the arrows, without limitation. Any suitable electronic communications infrastructure supports these communication pathways, whether direct or indirect, for example as described above in regard to communication pathways 114.

DBMS 1 application software (of “DBMS software”) 110 is hosted by and executes on a production database server 302 (e.g., 302-1). DBMS software 110 is illustratively a version of Oracle software, but in alternative embodiments it can be IBM DB2, Sybase, MySQL, PostgreSQL, Microsoft SQL Server, SAP HANA, etc., without limitation. The associated data agent 142 is configured to be knowledgeable about and compatible with the Oracle database management system in general and with the DBMS software 110 version in particular, e.g., an Oracle data agent (or in alternative embodiments correspondingly a DB2 data agent, DB2 MultiNode data agent, etc.).

Discovery module 442 is a functional software module that executes on demand (e.g., based on instructions received from storage manager 340 and/or from proxy control logic 324) to identify executable software(s) on the host client computing device 302, and more specifically, to identify the respective directory (or folder) that represents a so-called “home” for the discovered software(s). For example, a “software home” (not shown) for database management software (e.g., DBMS 1 110) comprises one or more executable files, such as binary files and library files, and configuration files for the database management software. The software home also could comprise other contents, such as log files, uninstall utilities, etc., without limitation, which may vary from one software manufacturer to another. Discovery module 442 is tasked with identifying the software home and the contents therein and further with identifying which of the files in the software home qualify as “container-related,” meaning that the container-related files in a software home are sufficient by themselves, if executed in a software-container, to properly execute the software version discovered in the software home, e.g., Oracle version 1.1. According to the illustrative embodiment, container-related files include binary files, library files, and configuration files. In alternative embodiments, or in regard to other DBMS software, other files may also qualify as container-related. More details regarding the operations and interoperations of discovery module 442 can be found in subsequent figures.

In some alternative embodiments, discovery module 442 operates autonomously on an ongoing or periodic basis, and not on demand, or in addition to on demand. In some alternative embodiments, discovery module 442 will seek to discover only certain pre-identified or specified application software, or only certain classes of software, e.g., DBMS software. Discovery module 442 is shown herein as a distinct component to ease understanding of the present disclosure, however, alternative embodiments are also possible within the scope of the present invention. For example, discovery functionality may be layered on or incorporated within existing data agent 142 code that also resides and operates on the same client computing device 302.

Primary storage device (storage array) 104 comprises a number of illustrative data elements, including database primary data DB1 112-1, DB1 snapshot 414-1, DB1 clone 415-1, DBMS 1 software “home” snapshot 416-1, and DBMS 1 “home” clone 417-1, as well as other data (not shown). DB1 112-1 is a database data source that serves as primary data for and is accessible by DBMS 1 software 110 executing on client computing device 302. As with any primary data, DB1 database data 112-1 may be read, changed, moved, deleted, and otherwise modified by the DBMS software 110 accessing it.

Illustratively, storage array 104 is equipped with hardware snapshot capabilities, i.e., the ability to take, store, and uniquely identify snapshots of volumes hosted by the storage array. The hardware snapshots may be taken by the storage array in response to commands or like instructions (e.g., using an application programming interface (API)) received from a storage management component such as media agent 144 (e.g., hosted by secondary storage computing device 106). Illustratively, the source volume for an array-generated snapshot may be a volume hosting primary data 112 or a volume hosting another snapshot such as 414. For convenience and to help with understanding the present disclosure, a “snapshot 414” herein is understood to mean a snapshot of a source volume hosting primary data 112, which is a static view or point-in-time copy of the source database data 112 as it existed at the time of snapshot 414 creation. A “clone 415” is a copy of a source volume that comprises a previously-taken snapshot 414 or another clone 415. Thus, a clone 415 is a copy taken of a snapshot, and is not a snapshot of primary data, though it also represents the same static view or point-in-time copy of the source volume hosting primary data 112 as it existed when snapshot 414 was taken.

In general, making a clone 415 of an existing snapshot 414 does not affect production database management operations. For example, to create a snapshot 414-1 of primary data 112-1, data agent 142 first momentarily quiesces DBMS 1 software 110 operating on the primary data 112-1; media agent 144 instructs storage array 104 to take a snapshot of the volume hosting primary data 112-1; storage array 104 duly generates a snapshot 414-1 and stores it to another volume on the storage array; media agent 144 indexes the identity and location of snapshot 414-1; and DBMS 1 software 110 is unquiesced, e.g., by data agent 142, so that it may resume operating. Thus, creating a snapshot 414 affects the production environment to the extent that quiescing is momentarily required.

On the other hand, when a clone 415 is needed, the production environment is no longer involved or affected thereby, because no interoperations with the DBMS software 110 on the client computing device 302 or with its primary data 112 are required. Instead, media agent 144 (e.g., hosted by secondary storage computing device 106) instructs storage array 104 to take a snapshot of the volume hosting an existing snapshot (e.g., 414-1); storage array 104 duly generates a clone 415-1 stored to yet another volume on the storage array; and media agent 144 indexes the identity and location of clone 415-1. Meanwhile, DBMS software 110 and its primary data 112-1 operate undisturbed by and uninvolved in cloning operations.

A DBMS “home” snapshot 416 (e.g., 416-1) is a snapshot that represents the so-called “software home” of DBMS software 110, such that the contents of DBMS snapshot 416 are sufficient to boot up and execute an instance of the DBMS software 110. Thus, DBMS snapshot 416 comprises the executable file(s) of the DBMS software, including binary files and library files, configuration files, associated program files, and any other files, data, and/or metadata used by the respective DBMS software to execute on production DB server 302. DBMS snapshot 416 excludes primary database data 112. Thus, DBMS snapshot 416 comprises, among other things, all files needed for container operations on proxy server 322—the so-called “container-related files” or “container-related content.” DBMS snapshot 416 is illustratively a software snapshot generated by the operating system of production DB server 302, which hosts the “software home.” The software snapshot operation is illustratively initiated by a command received by co-resident data agent 142 from storage manager 340, and the resulting snapshot contents are transmitted by data agent 142 to media agent 144, which stores it to a volume in storage array 104. In the illustrative system 300, one snapshot 416 of a production DBMS software home is sufficient for performing the subsequent storage and testing operations described herein in regard to proxy server 322, hence the “one-time” designation of snapshot 416-1. Thus, as to any production DBMS software 110 (e.g., DBMS 1, DBMS 2, etc.) on a given production DB server 302, a “one-time” snapshot 416 suffices to enable the subsequent operations that flow therefrom in system 300.

A DBMS “home” clone 417 is a snapshot copy of a source volume that comprises a previously-taken DBMS snapshot 416 or another existing clone 417. Like DBMS snapshot 416, the contents of DBMS clone 417 suffice to instantiate and execute the respective DBMS software 110. DBMS clone 417 can be mounted to a container 323 for instantiating the DBMS software 521 and executing it within the respective container. Like DBMS snapshot 416, DBMS clone 417 also is a one-time operation from which the subsequent storage operations and testing flow in the illustrative system.

FIG. 5A is a block diagram depicting further detail of certain components of system 300, including proxy control logic 324. FIG. 5A depicts: secondary storage device 108 comprising secondary copy(ies) of DBMS software 531, secondary copy(ies) of container template(s) 535, and secondary copy(ies) of database data 116; proxy control logic 324 comprising container manager 530, software-cache 532 (comprising DBMS software(s) 521, target operating system(s) (lightervisors) 523, container templates 525, storage management software(s) 527, data agent(s) 542, and media agent(s) 544), cache catalog 534, and catalog service 538 comprising rules 536; and index server 350.

Secondary copy(ies) of DBMS software 531, secondary copy(ies) of container template(s) 535, and secondary copy(ies) of database data 116 represent copies (e.g., backup copies, archive copies) generated by storage operations in system 300. For example, DBMS software 521 (originally in software cache 532) that was archived to secondary storage would have resulted in a secondary (archive) copy 531. Likewise, a lightervisor 523 from software cache 532 that was archived to secondary storage would have resulted in a secondary (archive) copy (not shown) on secondary storage device 108. Likewise, a container template 525 from software cache 532 that was archived to secondary storage would have resulted in a secondary (archive) copy 535 on secondary storage device 108. Likewise, a version of storage management software 527 from software cache 532 that was archived to secondary storage would have resulted in a secondary (archive) copy (not shown) on secondary storage device 108. Secondary copies of database data, such as secondary copies of primary data 112, of snapshots 414, etc. are represented by secondary copies 116.

Proxy control logic 324 comprises container manager 530, software-cache 532, cache catalog 534, and catalog service 538 comprising rules 536.

Container manager 530 is a functional component of system 300, and is primarily concerned with ensuring that storage and test operations can be performed on proxy server 322 by using containers 323, which involves communicating with storage manager 340, creating and activating containers 323, and destroying containers 323 on task completion. More details are given in regard to FIG. 6 (e.g., block 670) and subsequent figures.

Software-cache 532 is a repository of data configured on proxy server 322 that stores a variety of data needed for properly populating and executing software containers 323 according to the illustrative embodiment, and software cache 532 is maintained on proxy server 322 in order to make its contents readily available when a software container is needed. Software cache 532 comprises one or more unique versions of: DBMS software 521, container templates 525, target operating system(s) (lightervisors) 523, storage management software(s) 527, data agent(s) 542, and media agent(s) 544.

DBMS software 521 comprises a collection of container-related files that are sufficient by themselves, if executed in a software-container 323, to properly execute the software version discovered in the software home, e.g., Oracle version 1.1. A given DBMS software exists in numerous versions, e.g., Oracle version 1.1, Oracle version 1.2, Oracle version 1.2.1. Consequently, a DBMS software 521 refers to a specific such version, e.g., Oracle version 1.2.1. According to the illustrative embodiment, container-related files include binary files, library files, and configuration files for a particular manufacture and version of DBMS software, e.g., Oracle version 1.2.1, and these collectively form DBMS software 521 in software-cache 532. In alternative embodiments, or in regard to other DBMS software, other files may also qualify as container-related.

A target operating system 523 for a software-container is also referred to herein as a lightervisor. For example, a Linux container (LXC) provides operating system-level virtualization via a virtual environment that has its own process and network space instead of providing a fully featured virtual machine. Lightervisors are well known in the art.

A container template 525 comprises a particular set of subcomponents such that a software container 323 can be immediately created therefrom, without assembling or importing further contents therein, and can then be activated and connected to a data source. According to the illustrative embodiment, a container template 525 comprises: a DBMS software 521, a target OS (lightervisor) 523, and a storage management software 527. The particular choice of elements 521, 523, and 527 may be specified by parameters received from storage manager 340 or from an administration console (not shown). It is convenient to maintain frequently-used container template(s) 525 in software-cache 532 rather than having to assemble and re-assemble like containers 323 repeatedly.

Storage management software 527 is supplied in the illustrative embodiment by Commvault Systems, Inc. of Tinton Falls, N.J., USA. Storage management software 527, like DBMS software 521, comprises binary files, library files, and configuration files needed to instantiate and run the software. Storage management software 527 comprises subcomponents, such as various types of data agents and media agents, each one suitable to a particular type of task or application as described in more detail in regard to FIGS. 1A-1H and 2A-2C herein. In regard to containerized operations on proxy server 323, depending upon the particular DBMS software 521 in the container (e.g., Oracle version 1.1), a suitable Oracle data agent 142 would be activated to run in the container and help perform the testing/storage operation tasked to the container. The other data agents 142 remain “decoupled,” i.e., are not executed in the container. Likewise, depending on the database data source and destination of the storage/testing operation to be run in the container, suitable media agent(s) 144 would be activated in order to provide access to the data storage devices involved in the operation, while others remain decoupled. Storage management software 527 exists in numerous versions, e.g., Version 10 Service Pack 3, Version 11 Service Pack 4, Version 11 Service Pack 5, etc. Consequently, a storage management software 527 refers to a specific such version, e.g., Version 11 Service Pack 4.

Cache catalog 534 is a data structure (or in some alternative embodiments a collection of data structures) that comprises an index of the contents of software cache 532, including a record of whether a particular software cache content, e.g., a version of DBMS software 521, is fully present in software cache 532 or has been archived and is represented only by a corresponding stub. Cache catalog 534 also indicates when each content element of software cache 532, e.g., a particular container template 525, a particular target OS (lightervisor) 523, etc., was last used in a software container 323 activated on proxy server 322. The cache catalogue 534 is kept current by the illustrative catalog service 538 entering updates therein whenever a software cache content element (e.g., DBMS software 521, target OS 523, container template 525, storage management software 527, data agent 542, and media agent 544) is used and/or added and/or archived. Catalog service 538 also reports cache catalog changes to index server 350, which comprises diverse indexed information collected throughout system 300, whether the information is related to software containers, storage operations, secondary copies, deduplication, configuration data, data contents, storage devices, etc., without limitation.

Catalog service 538 comprises rules 536, which govern whether content elements of software cache 532 should be archived. Generally, lesser used contents will be archived (using data agent 542 and media agent 544) from being readily available in software cache 532 to an archive copy stored in secondary storage device 108 (e.g., 531, 535). After archiving a particular content element, catalog service 538 places a stub into software cache 532 pointing to the secondary (archive) copy. Archiving is triggered by one or more thresholds maintained in rules 536, e.g., a percentage of allocated storage space occupied by software cache 532, an absolute amount of storage space occupied by software cache 532, etc. Rules 536 generally favor archiving contents that are rarely used or have not been used longer than a threshold amount of time. To that end, catalog service 536 analyzes the timestamp information in cache catalog 534 to determine when a content element of software cache 532 is ripe for archiving. This approach favors frequently used and recently used content over lesser used content, though in some alternative embodiments additional rules are contemplated, such as ensuring that the most recent version of storage management software 527 is always in software cache 532 even if it does not meet a frequency metric; other keep-versus-archive criteria are possible as well, without limitation. After archiving, content can be retrieved on demand in case it is needed for a container 323 as described in further detail in regard to FIG. 6 and subsequent figures.

According to the illustrative embodiment, storage management software 527 comprises a number of data agents 142 and media agents 144 needed for the storage operations and testing to be performed using containers 323. However, at least one data agent 542 and media agent 544 are maintained separately in a ready state in software cache 532 as shown here, for purposes of moving contents into and out of software cache 532 without reference to and independently of whether a software container 323 is active or not. Accordingly, data agent 542 is suitable to the file system and operating system of proxy server 322. Media agent 544 is suitable to the particular secondary storage device(s) 108 that store secondary copies that might be needed for containerized operations on proxy server 322.

FIG. 5B is a block diagram depicting further detail of certain components of system 300, including an illustrative container 323, as well as certain data movement operations using a snapshot clone as a data source for generating a secondary copy. FIG. 5B depicts: primary storage device (storage array) 104 comprising DB1 clone 415-1; secondary storage device 108 comprising secondary copy of database data 116-1 and secondary copy of database data 116-2; container 323 comprising DBMS software 521 (e.g., Oracle version 1.0), target OS (lightervisor) 523, and storage management software 527 (comprising data agent 142 and media agent 144); and storage manager 340 comprising management database 146. Communications among data agent 142, media agent 144, and storage manager 340 are depicted by bi-directional arrows 114.

Container 323 is shown here in an activated state wherein the contents are executing and performing a backup operation. DB1 clone 415-1 is directly accessible to DBMS software 521 as a database data source. Secondary copy 116-1 is the destination of the backup operation and represents the database data in a backup format (e.g., encrypted, compressed, with metadata, etc.). The dotted unidirectional arrows represent the logical data flow from source to destination, including processing of the data by data agent 142 and media agent 144 as described in more detail elsewhere herein.

Secondary copy 116-2 is an alternative database data source, i.e., a data source in secondary copy format that must first undergo a restore operation before it can be readily accessible to DBMS software 521. In such a case, data agent 142 and media agent 144 would first restore secondary copy 116-2 to a volume configured on storage array 104 and the restored data therein would then be accessible to DBMS software 521 executing in container 323. More details are given in subsequent figures (see, e.g., block 1204 in FIG. 12).

FIG. 6 depicts some high-level salient operations of a method 600 according to an illustrative embodiment of the present invention. The present high-level depiction shows two asynchronous operations occurring on proxy server 322: block 660 and block 670. Block 660 comprises populating and maintaining software cache 532 on proxy server 322; this is an ongoing operation that can continue indefinitely as shown by the looping arrow. Block 670 comprises performing any number of storage and/or test operations using respective containers 323 on proxy server 322; these operations can be concurrent or can overlap with each other in time without limitation; these operations can repeat indefinitely as shown by the looping arrow. Operations in block 670 are asynchronous with those in block 660, although as shown by the bi-directional arrow connecting block 660 with block 670, information from one block is transmitted to and used by the other block at times. More details are given in subsequent figures.

FIG. 7 depicts some salient operations of block 660 in method 600. Block 660 generally populates and maintains software cache 532 on proxy server 322, and is largely, though not exclusively, performed by catalog service 538, which executes on proxy server 322.

At block 702, a list of container-eligible clients is created in system 300 and illustratively stored to catalog service 538 and optionally to management database 146. The list is created by client self-registration, e.g., by a user/administrator of client computing device 302. In some alternative embodiments, an enhanced data agent 142 that executes on client computing device 302 and is DBMS-specific is specially programmed to self-register because it supports DBMS software, and is further programmed to do so without intervention from a user/administrator; in contrast, other kinds of data agents 142 do not self-register. In other alternative embodiments, storage manager 340, or alternatively, a system administrator with access to storage manager 340 (e.g., using an administrative console) identifies a set of key servers 302 in system 300 that should be made container-eligible. In some alternative embodiments, block 702 is skipped altogether and control passes to block 704 such that discovery 442 is not selective and therefore executes on all client computing devices.

At block 704, discovery module 442 executes on each container-eligible client computing device 302 (unless the process is not selective as mentioned above and all client computing devices 302 are subjected to discovery). On any given client computing device 302, discovery module 442 identifies the software home of a database management software. Discovery software is well known in the art. In the present embodiment, discovery module 442 is specially tasked with identifying the software home of database management software, though in alternative embodiments other software homes may be discovered as well. The discovered information, including details about the contents of each discovered software home, is transmitted by discovery module 442 to catalog service 538 executing on proxy server 322.

At block 706, catalog service 538 consults cache catalog 534 to determine whether the discovered container-related DBMS software contents in the software home on client computing device 302 are available from software cache 532, such as a binaries of the DBMS software, libraries, and configuration files. If the discovered DBMS software contents in the software home are not in software cache 532 already (in full or in stubbed form), catalog service 538 initiates a backup of the DBMS software home from client 302 to software cache 532 on proxy server 322. At the completion of block 706 the discovered DBMS software contents are available from software cache 532. More details are given in a subsequent figure.

At block 708, if free storage space in cache 532 passes a threshold, catalog service 538 initiates archiving of one or more contents of cache 532 to secondary storage (e.g., 108) to free up space, and updates cache catalog 534 accordingly to reflect changes in software cache contents. More details are given in a subsequent figure.

At block 710, when contents of software cache 532 are used in a container 323 executing on proxy server 322, catalog service 538 receives notice from container manager 530 (see, e.g., block 670) and updates cache catalog 534 accordingly. For example, when a container 323 is activated, a timestamp is generated and becomes associated with content elements of the activated container, e.g., DBMS software 521, target OS 523, storage management system software 527, and/or container template 525. These timestamps, also referred to herein as “last-used timestamps” enable catalog service 538 to apply rules 536 to determine which contents of software cache 532 should be archived, as discussed in block 708. More details are given in a subsequent figure.

At block 712, control passes back to block 702 to continue populating and maintaining software cache 532. The processes of block 660 occur on an ongoing basis. For example, when a new client computing device 302 is added to system 300, discovery may be initiated as described at block 702. In some embodiments, the processes of block 660 may occur on a scheduled basis, e.g., daily, weekly, etc., except that notifications on container usage received from container manager 530 are not scheduled by catalog service 538; likewise, on demand commands or instructions from storage manager 340 or from an administrative console also are not scheduled.

FIG. 8 depicts some salient operations of block 670 in method 600. In general, block 670 performs any number of storage and/or test operations using respective containers 323 on proxy server 322, and these operations may be concurrent or may overlap with each other over time, without limitation.

At block 802, container manager 530 executing on proxy server 322 receives parameters for a storage/test operation from storage manager 340 and/or from an administration console. Parameters include identifiers for and/or indicators of, for example the type of operation to be performed (e.g., backup, archive, restore, test, etc.), a DBMS software version (e.g., Oracle version 1.3.1), a target OS (lightervisor), a data source, and a version of storage management software to use in performing the storage/test operation. Parameters may further include a destination for a storage operation, such as a storage device (e.g., 108) for storing a secondary copy or a storage device (e.g., 104) for storing data restored from secondary storage.

At block 804, container manager 530 generates a container 323 using contents obtained from software cache 532, including a target OS (lightervisor) 523, a DBMS software 521, and storage management software 527 (in decoupled mode), or uses a matching pre-existing container template 523 if one already exists with all the desired content elements (target OS, DBMS software, and storage management software). More details are given in a subsequent figure.

At block 806, container manager 530 activates container 323, which includes transmitting a notice of use to catalog service 538 (see, e.g., block 660, block 710). Once the container is activated, software components therein, e.g., DBMS software and target OS (lightervisor), are instantiated and begin executing—they are said to execute within the container 323.

At block 808, container manager 530 activates an appropriate DBMS-specific data agent 142 within the storage management software 527 in the container. In other words, though the storage management software 527 in the container comprises numerous kinds of data agents 142 and media agents 144, only a suitable data agent 142 is activated for participating in the storage/test operations contemplated for the DBMS software in the container. The others remain inactive in “decoupled mode.” Illustratively, an Oracle data agent 142 is activated to support an Oracle version 1.3.1 DBMS software in the container. Likewise, a suitable media agent 144 is activated for accessing secondary storage device 108. Once activated, data agent 142 in the container establishes communications with storage manager 340 (e.g., based on information supplied by container manager 530) and registers as a client with storage manager 340. Registering as a client of system 300 enables the storage/test operations to proceed. Storage manager 340 accordingly stores the client information in management database 146.

At block 810, DBMS software 521 in container 323 becomes connected with a database data source so that the contemplated storage/test operation can proceed. For example, a DB clone 415 configured in a volume on storage array 104 may be a data source for a backup operation to generate a secondary copy 116 to be stored into secondary storage device 108. Alternatively, a secondary copy of database data 116 in secondary storage device 108 may be a data source for a test operation to check compatibility between secondary copy 116 and DBMS software 521, or may be a data source for restoring an older point-in-time copy of a database (116) to the production environment so that it can become accessible to production DBMS software 110. More details are given in a subsequent figure.

At block 812, having activated all the necessary software elements and established a connection to the appropriate data source, the desired storage/test operation is performed. For example, data may be backed up from storage array 104 to secondary storage device 108 (e.g., creating a secondary copy 116 from a DB clone 415). For example, a secondary copy 116 may be restored from secondary storage 108 to storage array 104 where it may be later promoted to primary data for a DBMS application 110 running on a client computing device 302. For example, a secondary copy 116 may be restored (in whole, or in part using pseudo-mount) from secondary storage 108 to storage array 104 where it may be used as a testbed to check any number of scenarios, e.g., whether the restored data is compatible with the DBMS software version in the container, whether the restored data and DBMS software in the container are compatible with the target OS in the container, whether the storage management software version in the container can properly restore a secondary copy 116 created by an older version; for measuring performance and comparing different versions of storage management software 527 after a new version is issued, etc. Storage manager 340 manages the desired storage/test operation here, including communicating with data agent 142 and media agent 144 operating in container 323 via communications pathway 114 (see, e.g., FIG. 5B).

At block 814, on completion of the tasks performed in a given container 323 (e.g., scheduled timeout, on demand termination) container manager 530 destroys the given container 323, reversing the effects of blocks 804, 806, 808, and 810. This operation comprises removing any temporary data structures from storage devices (e.g., a temporary restored data destination set up on storage array 104 is removed and the storage volume is released), causing the data agent 142 in the container to pro-actively de-register as a client from storage manager 340, and de-activating the software elements in container 323. Optionally, a template 525 of the container is generated by container manager 530 and stored to software-cache 532 for possible re-use at a later time (with associated updates to cache catalog 534). The container 323 is destroyed.

At block 816, any number of other storage or testing operations using other respective containers 323 may occur on proxy server 322, whether at the same time in whole or in part as other storage/test operations hosted by other containers 323. As noted elsewhere, because the storage/test operation occurs with software elements executing in the software container 323, any number of other similar operations can be performed at the same time, in whole or in part, in other containers 323 executing on the same proxy server 323. Thus, for example, if two different versions of Oracle DBMS software are to be compared in regard to operating from an older restored point-in-time database backup copy 116, two distinct software containers 323 can be created one for each respective version of Oracle DBMS software. With no namespace conflicts due to containerization, the restore operations can be executed concurrently or substantially concurrently and performance metrics collected and compared. Likewise, different versions of storage management software 527 can be run concurrently and compared. Also, different point-in-time snapshots 414 of production database data (e.g., 414-1, 414-2, 414-3, etc.) can be cloned to a respective clone 415 and from there each DB clone 415 can be backed up using a respective container 323 regardless of whether an earlier clone 415 is also being backed up at the same time. This is very convenient if the point-in-time snapshots 414 are taken more frequently than the duration of the respective backup operations; if the backups take longer than the interval between snapshots 414, the containerization techniques described herein will enable any number of backups to occur on proxy server 322 concurrently and/or overlappingly without concerns over namespace conflicts.

FIG. 9 depicts some salient operations of block 706 in method 600, which are largely executed or initiated by catalog service 538. Block 706 is generally concerned with ensuring that software cache 532 is up to date, and if a discovered DBMS software is not in cache 532, back up the DBMS home from client 302 to cache 532 on proxy server 322.

At block 902, catalog service 538 queries cache catalog 534 whether the discovered DBMS software (including binaries, libraries, configuration file(s)) is in software cache 532. The query can take any form, including illustratively reading cache catalog 534 by catalog service 538.

At block 904, if according to cache catalog 534, the discovered DBMS software is already stored in software cache 532 (e.g., DBMS software 521) and is present in full and not represented as a stub therein, no further action is required and control effectively passes out of block 706.

At block 906, if according to cache catalog 534, the discovered DBMS software is stubbed in software cache 532, catalog service 538 initiates a restore operation. Accordingly, the stub points to a secondary copy of DBMS software 531 stored in secondary storage (e.g., 108). This copy is restored from there to software cache 532. Illustratively, binary files, library files, and configuration files are collectively restored using data agent 542 and media agent 544 which are always available in software cache 532. See, e.g., FIG. 5A. Illustratively, catalog service 538 initiates and manages the restore operation autonomously. In some alternative embodiments, catalog service 538 notifies storage manager 340 of the need to initiate the restore operation using data agent 542 and media agent 544, and storage manager 340 then takes control to manage the restore operation. At the completion of block 906, the discovered DBMS software 521 is stored in full (including binary files, library files, and configuration file(s)) into software cache 532 from which it may be readily used for storage/test operations at block 670.

At block 908, if according to cache catalog 534, the discovered DBMS software is not found in software cache 532 (whether in full or represented by stub(s)), catalog service 538 initiates a backup of the discovered DBMS home from client computing device 302 (the so-called container-related files or container-related content) to software cache 532. Illustratively, binary files, library files, and configuration files in the software home directory on client computing device 302 are collected by a co-resident data agent 142 thereon and in conjunction with a media agent 144 (see, e.g., FIG. 4) they are backed up in full and stored into software cache 532 on proxy server 322. Illustratively, catalog service 538 initiates and manages this backup operation autonomously. In some alternative embodiments, catalog service 538 notifies storage manager 340 of the need to initiate the backup operation using data agent 142 and media agent 144, and storage manager 340 then takes control to manage the backup. At the completion of block 908, the discovered DBMS software 521 is stored in full (including binary files, library files, and configuration file(s)) into software cache 532 from which it may be readily used for storage/test operations in block 670.

At block 910, catalog service 538 updates cache catalog 534 to reflect the availability in full and the timestamp of adding DMBS software 521 into software cache 532.

At block 912, catalog service 538 reports the update of cache catalog 534 to index server 350. In case of a failure of proxy server 322 or of data corruption in cache catalog 534, catalog service 538 and/or storage manager 340 can later retrieve the information from index server 350.

FIG. 10 depicts some salient operations of block 708 in method 600. Block 708 is generally directed at freeing up storage space in software cache 532 based on threshold considerations.

At block 1002, catalog service 538 determines that a pre-defined storage-space threshold has been passed by software cache 532. Illustratively the threshold value is stored among rules 536. One or more thresholds may be concurrently operational. For example, the threshold illustratively is a percentage of the total storage space allocated to software cache 532, e.g., 80%. Alternatively, the threshold may be an absolute size of the storage space occupied by software cache 532. In some embodiments, the threshold may be a combination of percentage and absolute amount, etc. without limitation. If the threshold has been passed, clean-up is required and control passes to block 1004.

At block 1004, cache catalog 534 and rules 536 come into play to determine which contents of software cache 532 to purge. Based on information in cache catalog 534 and rules 536, catalog service 538 analyzes usage of software cache contents to identify one or more contents to archive. For example, content that is least-frequently used relative to other content in the software cache is identified so that it can be archived in the next block. In alternative embodiments, oldest-used content is identified for archiving. In other embodiments, the analysis is more granular, for example identifying the least-frequently used content by type, e.g., DBMS software, target OS, version of storage management software, container template, etc., and only the least-frequently used of each type is identified for archiving, making sure to retain at least one of each type of content in the software cache. Similarly, in other embodiments, the oldest-used content is identified by type of content. In some embodiments, content that was last used before a certain threshold timeframe is identified for archiving, e.g., more than one year ago. In some embodiments, a content version that goes back more than a threshold number of releases, e.g., more than three versions ago, is identified for archiving. Other schemes for identifying contents of the software cache for archiving are also possible in other embodiments.

At block 1006, for each identified content, catalog service 538 initiates an archive operation to move the identified content from software cache 532 into an archive copy in secondary storage (e.g., 108). The data agent 542 and media agent 544, which are readily available in software cache 532 are used for the archiving operation. Catalog service 538 manages the archive operation. In some alternative embodiments, catalog service 538 notifies storage manager 340 of the need to archive contents from software cache 532 using data agent 542 and media agent 544, and storage manager 340 takes control to manage the archive operation. Any number of archive copies can be created, e.g., 531, 535, etc.

At block 1008, after the archiving operation is complete, catalog service 538 creates a stub in software cache 532 that points to the archive copy in secondary storage.

At block 1010, catalog service 538 updates cache catalog 534 to indicate that certain contents are available in stubbed form in software cache 532 and also reports the update(s) to index server 350.

FIG. 11 depicts some salient operations of block 804 in method 600. Block 804 is generally directed at container manager 530 generating a container 343 using contents obtained from software cache 532.

At block 1102, container manager 530 queries catalog 534 to determine whether all needed content for container 323 according to received parameters for the desired storage/test operation are available in software cache 532. The query illustratively takes the form of container manager 530 reading cache catalog 534, although other query implementations are possible in alternative embodiments.

At block 1104, when container manager 530 determines that a container template 525 that matches all parameters exists in full (not stubbed) in software cache 532, the template 525 as is can be readily used to generate the desired container 323, control passes to block 1112.

At block 1106, when container manager 530 determines that no existing container template 525 matches the parameters for the desired storage/test operation, and further determines that all parameters can be matched by other contents of software cache 532 that are present therein in full (not stubbed) and can therefore be readily used to generate the desired container 323, control passes to block 1112.

At block 1108, having determined that necessary content is not readily available in software cache 532 for generating a container 323, container manager 530 determines that a restore operation is required. Accordingly, container manager 530 initiates a restore operation of archive copies available from secondary storage (e.g., 108) to be put back into software cache 532 in full. Container manager 530 illustratively manages the restore operation, identifying the needed archive copies, e.g., 531, 535, and instructing the local data agent 542 and media agent 544 to perform the restore. After the restore operation completes, the desired content is available in full in the software cache 532 to be used in creating a container 323 at block 1112. In some alternative embodiments, container manager 530 notifies storage manager 340 of the need to restore content from secondary storage into software cache 532 and storage manager 340 takes control to manage the restore operation.

At block 1110, container manager 530 updates cache catalog 534 to reflect the content changes to software cache 532 after the restore operation and also reports the update(s) to catalog service 538 for reporting in turn to index server 350. In some alternative embodiments, the updates to cache catalog 534 are implemented indirectly, via catalog service 538, rather than by container manager 530. In other embodiments, container manager 530 reports catalog changes to index server 350.

At block 1112, container manager 530 generates a container 323 that matches the parameters for the desired operation using content obtained from software cache 532. For example, an existing container template 525, and/or DBMS software 521, target OS 523, and storage management software 527. Creating a software container such as container 323 from a template such as template 525 is well known in the art. Likewise, creating a software container 323 using a plurality of software elements such as DBMS software 521, target OS (lightervisor) 323, and storage management software 527 also is well known in the art.

FIG. 12 depicts some salient operations of block 810 in method 600. Block 810 is generally directed at connecting DBMS software 521 executing in container 323 to a proper data source for performing database management operations in service of the desired storage/test operation.

At block 1202, which is a decision point, container manager 530 determines whether the desired database data source is available from a snapshot (e.g., 414). If yes, control passes to block 1206, otherwise control passes to block 1204. In some embodiments, the present analysis is performed by storage manager 340.

At block 1204, since the database data source is not available from a snapshot 414 and is available from a secondary copy 116 (in secondary copy format) instead, the data source location is treated as a pseudo-mount device, meaning that data to be used by DBMS software 521 is identified and restored only as needed from the secondary copy 116, data is read by DBMS software 521 on demand from secondary storage, but the rest of the data source (secondary copy 116) remains stubbed in its secondary copy format. A pseudo-disk driver is used for these purposes. The result is that DBMS software 521 executing in container 323 now gains access to the on-demand restored data as its database data source. An example of this pseudo-disk driver and illustrative uses may be found in U.S. Pat. Pub. No. 2016/0041880 A1, entitled “Efficient Application Recovery In An Information Management System Based On Pseudo-Storage-Device Driver,” filed on Aug. 6, 2014, and in U.S. Pat. Pub. No. 2016/0154709 A1, entitled “Point-In-Time Backups Of A Production Application Made Accessible Over Fibre Channel And/Or iSCSI As Data Sources To A Remote Application By Representing The Backups As Pseudo-Disks Operating Apart From The Production Application And Its Host”, filed on Feb. 3, 2016, both of which are hereby incorporated by reference herein.

In alternative embodiments, it is possible to fully restore (all data in) the secondary copy 116 (e.g., alternate database data source 116-2) to a storage volume (not shown) configured in storage array 104. This scenario is necessary when the desired storage operation is to restore the secondary copy 116 (e.g., 116-2) so that a point-in-time database copy can be harnessed into service as primary data for a database management application 110 on a database server 302. This scenario also might be necessary when a pseudo-disk solution is not available. However, a full restore is generally a much longer operation than on-demand restores using the pseudo-disk, and is thus undesirable for test purposes.

At block 1206, since the desired database data source is available from a snapshot such as DB snapshot 414, the snapshot is cloned illustratively into DB clone 415—if clone 415 does not already exist. The operation is initiated by container manager 530 in communication with media agent 144 on secondary storage computing device 106 (see, e.g., FIG. 4), which can communicate with storage array 104 and instruct it to execute the cloning procedure. In some alternative embodiments, container manager 530 notifies storage manager 340 of the need to execute the cloning procedure, and storage manager 340 takes control and instructs media agent 144 accordingly to instruct storage array 104 to make clone 415.

At block 1208, the operating system (not shown) of proxy server 322 presents the clone (e.g., 415) to container 323 as a mountable storage device with an associated mountpoint. This operation is well known in the art.

At block 1210, the target OS (lightervisor) 523 operating in container 323 mounts the mountable device to container 323. This operation also is well known in the art. The result is that DBMS software 521 executing in container 323 now gains access to DB clone 415 as its database data source.

In regard to the figures described herein, other embodiments are possible within the scope of the present invention, such that the above-recited components, steps, blocks, operations, messages, requests, queries, and/or instructions are differently arranged, sequenced, sub-divided, organized, and/or combined. In some embodiments, a different component may initiate or execute a given operation. For example, in some embodiments, storage manager 340 may instruct container manager 530 to create one or more software container 323 suitable for a particular storage operation and/or test operation, whereas in other embodiments, storage manager 340 provides only operation parameters and container manager 530 determines which containers 323 to create and what elements each container should properly contain in order to perform the operations indicated by storage manager 340.

Example Embodiments

Some example enumerated embodiments of the present invention are recited in this section.

According to an illustrative embodiment of the present invention a method associated with a data storage management system may comprise: on a first client computing device, executing a software-discovery module to identify a home directory for a first version of a database management software that executes on the first client computing device, wherein container-related contents for the first version of the database management software, including one or more of (i) executable files, (ii) configuration files, and (iii) library files, are discovered in the home directory by the software-discovery module; and determining whether a software-cache configured on a proxy server that is a component of the data storage management system comprises files that match the container-related contents of the home directory for the first version of the database management software discovered by the software-discovery module on the first client computing device. The above-recited method further comprising: when one or more files matching the container-related contents discovered by the software-discovery module on the first client computing device are lacking from the software-cache on the proxy server, initiating, by the proxy server, a backup operation of the home directory for the first version of the database management software. The above-recited method wherein the backup operation creates a copy of the container-related contents of the home directory and stores the copy to the software-cache on the proxy server, thereby populating the software-cache with the container-related contents for the first version of the database management software. The above-recited method further comprising: creating, by the proxy server, a software-container comprising (a) the container-related contents for the first version of the database management software obtained from the software-cache, (b) a data agent associated with the first version of the database management software, and (c) a media agent for accessing database-data. The above-recited method further comprising: executing the software-container by the proxy server, wherein the first version of the database management software executes therein, and wherein, based on instructions received by the data agent and the media agent executing in the software-container, from a storage manager that manages the data storage management system, a storage operation is performed for a source of database-data. The above-recited method wherein the storage operation is based on using the container-related contents of the first version of the database management software obtained from the software-cache on the proxy server while the first client computing device remains uninvolved in the storage operation.

According to another illustrative embodiment, a method associated with a data storage management system comprises: on a first client computing device, executing a software-discovery module to identify a home directory for a first version of a database management software that executes on the first client computing device, wherein container-related contents for the first version of the database management software, including one or more of (i) executable files, (ii) configuration files, and (iii) library files, are discovered in the home directory by the software-discovery module; determining whether a software-cache configured on a proxy server that is a component of the data storage management system comprises files that match the container-related contents of the home directory for the first version of the database management software discovered by the software-discovery module on the first client computing device; when one or more files matching the container-related contents discovered by the software-discovery module on the first client computing device are lacking from the software-cache on the proxy server, initiating, by the proxy server, a backup operation of the home directory for the first version of the database management software, wherein the backup operation creates a copy of the container-related contents of the home directory and stores the copy to the software-cache on the proxy server, thereby populating the software-cache with the container-related contents for the first version of the database management software; creating, by the proxy server, a software-container comprising (a) the container-related contents for the first version of the database management software obtained from the software-cache, (b) a data agent associated with the first version of the database management software, and (c) a media agent for accessing database-data; executing the software-container by the proxy server, wherein the first version of the database management software executes therein, and wherein, based on instructions received by the data agent and the media agent executing in the software-container, from a storage manager that manages the data storage management system, a storage operation is performed for a source of database-data; and wherein the storage operation is based on using the container-related contents of the first version of the database management software obtained from the software-cache on the proxy server while the first client computing device remains uninvolved in the storage operation.

The above-recited method may further comprise: updating a catalog which is associated with the software-cache, on the proxy server, to indicate when the container-related contents of the first version of the database management software were used to create the container. The above-recited method wherein after populating the software-cache with the container-related contents for the first version of the database management software, updating a catalog which is associated with the software-cache, on the proxy server, to indicate when the container-related contents of the first version of the database management software were added to the software-cache. The above-recited method may further comprise: determining, by the proxy server, whether the amount of storage space occupied by the software-cache exceeds a threshold; when the threshold has been exceeded, applying one or more archiving rules that govern the software-cache to identify a set of contents stored in the software-cache; and archiving the identified set of contents stored in the software-cache to one or more secondary storage devices in communication with the proxy server, thereby causing the amount of storage space occupied by the software-cache to fall below the threshold. The above-recited method may further comprise: determining, by the proxy server, whether the amount of storage space occupied by the software-cache passes a threshold; when the threshold has been passed, applying one or more archiving rules that govern the software-cache to identify a set of contents stored in the software-cache, wherein the one or more archiving rules favor archiving lesser-used contents of the software-cache as compared to other contents of the software-cache; and archiving the identified set of contents from the software-cache into respective secondary copies stored to one or more secondary storage devices in communication with the proxy server, thereby satisfying the threshold, wherein a stub pointing to the respective secondary copy replaces the archived contents in the software-cache.

The above-recited method wherein lesser-used contents have older last-used timestamps than other contents of the software-cache. The above-recited method wherein lesser-used contents were used less frequently than other contents of the software-cache. The above-recited method may further comprise: determining, by the proxy server, whether the amount of storage space occupied by the software-cache passes a threshold; when the threshold has been passed, identifying a set of contents stored in the software-cache, based on one or more of: when last-used in a software-container, how often used in software containers operating on the proxy server, a version number of the contents, and an age of a version of the contents; and archiving the identified set of contents from the software-cache into respective secondary copies stored to one or more secondary storage devices in communication with the proxy server, thereby satisfying the threshold, wherein a stub pointing to the respective secondary copy replaces the archived contents in the software-cache. The above-recited method wherein the determining whether the software-cache configured comprises files that match the discovered container-related contents of the home directory for the first version of the database management software is based on analyzing a catalog on the proxy server that comprises an index of the contents of the software-cache. The above-recited method wherein the executing of the software-container comprises the data agent registering as a client with the storage manager, thereby enabling the storage operation to proceed. The above-recited method wherein the storage operation is a backup that generates a secondary copy of the source of database-data associated with the database management software, wherein the secondary copy is stored by the media agent to a secondary storage device in communication with the proxy server.

The above-recited method wherein the storage operation is a restore that uses the source of database-data, which is a secondary copy stored in a secondary storage device in communication with the proxy server, to generate database-data in a format and location that are accessible as primary data to the first version of the database management software executing in the software-container on the proxy server. The above-recited method wherein the source of database-data is a clone of a snapshot of primary data residing on a storage device, wherein a logical volume configured on the storage device comprises the clone, and wherein the clone is accessible as primary data to the first version of the database management software that executes in the software-container on the proxy server, while the first client computing device lacks access to the clone. The above-recited method may further comprise: creating, by the storage manager, a list of client computing devices operating in the data storage management system that are designated as container-eligible; and wherein the first client computing device is on the list of container-eligible client computing devices. The above-recited method may further comprise: creating, by the storage manager, a list of container-eligible applications executing on one or more client computing devices in the data storage management system; and wherein the database management software that executes on the first client computing device is one of the container-eligible applications on the list.

According to another illustrative embodiment, a computer-readable medium, excluding transitory propagating signals, stores instructions that, when executed by at least one computing device designated a proxy server in a data storage management system, cause the proxy server to perform operations comprising: determining whether a software-cache configured on the proxy server comprises files that match container-related contents of a home directory for a first version of a database management software discovered by a software-discovery module on a first client computing device in communication with the proxy server; when one or more files matching the container-related contents for the first version of the database management software discovered on the first client computing device are lacking from the software-cache on the proxy server, initiating, by the proxy server, a backup operation of the home directory for the first version of the database management software, wherein the backup operation creates a copy of the container-related contents of the home directory and stores the copy to the software-cache on the proxy server, thereby populating the software-cache with the container-related contents for the first version of the database management software; creating, by the proxy server, a software-container comprising (a) the container-related contents for the first version of the database management software obtained from the software-cache, (b) a data agent associated with the first version of the database management software, and (c) a media agent for accessing database-data; executing the software-container by the proxy server, wherein the first version of the database management software executes therein, and wherein, based on instructions received by the data agent and the media agent executing in the software-container from a storage manager that manages the data storage management system, a storage operation is performed for a source of database-data; and wherein the storage operation is based on using the container-related contents of the first version of the database management software obtained from the software-cache on the proxy server while the first client computing device remains uninvolved in the storage operation.

The above-recited computer-readable medium wherein the container-related contents for the first version of the database management software, comprise one or more of (i) executable files of the database management software, (ii) configuration files for the database management software, and (iii) library files for the database management software. The above-recited computer-readable medium wherein the proxy server operations further comprise: updating a catalog which is associated with the software-cache, on the proxy server, to indicate when the container-related contents of the first version of the database management software were used to create the container. The above-recited computer-readable medium wherein after populating the software-cache with the container-related contents for the first version of the database management software, updating a catalog which is associated with the software-cache, on the proxy server, to indicate when the container-related contents of the first version of the database management software were added to the software-cache. The above-recited computer-readable medium wherein the proxy server operations further comprise: determining, by the proxy server, whether the amount of storage space occupied by the software-cache exceeds a threshold; when the threshold has been exceeded, applying one or more archiving rules that govern the software-cache to identify a set of contents stored in the software-cache; and archiving the identified set of contents stored in the software-cache to one or more secondary storage devices in communication with the proxy server, thereby causing the amount of storage space occupied by the software-cache to fall below the threshold. The above-recited computer-readable medium wherein the proxy server operations further comprise: determining, by the proxy server, whether the amount of storage space occupied by the software-cache passes a threshold; when the threshold has been passed, applying one or more archiving rules that govern the software-cache to identify a set of contents stored in the software-cache, wherein the one or more archiving rules favor archiving lesser-used contents of the software-cache as compared to other contents of the software-cache; and archiving the identified set of contents from the software-cache into respective secondary copies stored to one or more secondary storage devices in communication with the proxy server, thereby satisfying the threshold, wherein a stub pointing to the respective secondary copy replaces the archived contents in the software-cache.

The above-recited computer-readable medium wherein lesser-used contents have older last-used timestamps than other contents of the software-cache. The above-recited computer-readable medium wherein lesser-used contents were used less frequently than other contents of the software-cache. The above-recited computer-readable medium wherein the proxy server operations further comprise: determining, by the proxy server, whether the amount of storage space occupied by the software-cache passes a threshold; when the threshold has been passed, identifying a set of contents stored in the software-cache, based on one or more of: when last-used in a software-container, how often used in software containers operating on the proxy server, a version number of the contents, and an age of a version of the contents; and archiving the identified set of contents from the software-cache into respective secondary copies stored to one or more secondary storage devices in communication with the proxy server, thereby satisfying the threshold, wherein a stub pointing to the respective secondary copy replaces the archived contents in the software-cache. The above-recited computer-readable medium wherein the determining whether the software-cache configured comprises files that match the discovered container-related contents of the home directory for the first version of the database management software is based on analyzing a catalog on the proxy server that comprises an index of the contents of the software-cache. The above-recited computer-readable medium wherein the executing of the software-container comprises the data agent registering as a client with the storage manager, thereby enabling the storage operation to proceed. The above-recited computer-readable medium wherein the storage operation is a backup that generates a secondary copy of the source of database-data associated with the database management software, wherein the secondary copy is stored by the media agent to a secondary storage device in communication with the proxy server.

The above-recited computer-readable medium wherein the storage operation is a restore that uses the source of database-data, which is a secondary copy stored in a secondary storage device in communication with the proxy server, to generate database-data in a format and location that are accessible as primary data to the first version of the database management software executing in the software-container on the proxy server. The above-recited computer-readable medium wherein the source of database-data is a clone of a snapshot of primary data residing on a storage device, wherein a logical volume configured on the storage device comprises the clone, and wherein the clone is accessible as primary data to the first version of the database management software that executes in the software-container on the proxy server, while the first client computing device lacks access to the clone. The above-recited computer-readable medium wherein the proxy server operations further comprise: creating, by the storage manager, a list of client computing devices operating in the data storage management system that are designated as container-eligible; and wherein the first client computing device is on the list of container-eligible client computing devices. The above-recited computer-readable medium wherein the proxy server operations further comprise: creating, by the storage manager, a list of container-eligible applications executing on one or more client computing devices in the data storage management system; and wherein the database management software that executes on the first client computing device is one of the container-eligible applications on the list.

According to another illustrative embodiment, a method associated with a data storage management system comprises: on a first client computing device, executing a software-discovery module to identify a home directory for a first version of a database management software that executes on the first client computing device, wherein container-related contents for the first version of the database management software, including one or more of (i) executable files, (ii) configuration files, and (iii) library files, are discovered in the home directory by the software-discovery module; determining whether a software-cache configured on a proxy server that is a component of the data storage management system comprises a template comprising files that match the container-related contents of the home directory for the first version of the database management software discovered by the software-discovery module on the first client computing device; when the template is represented by a stub in the software-cache, initiating, by the proxy server, a restore operation of the template from an archive copy thereof stored in a secondary storage device in communication with the proxy server, thereby populating the software-cache with the template for the software-container; when the template is not found in the software-cache and further when a stub for the template also is not found in the software-cache, initiating, by the proxy server, a backup operation of the home directory for the first version of the database management software, wherein the backup operation creates a copy of the container-related contents of the home directory and stores the copy to the software-cache on the proxy server, thereby populating the software-cache with the container-related contents for the first version of the database management software, and creating the template in the software-cache; creating, by the proxy server, a software-container based on the template obtained from the software-cache, the software-container comprising (a) the container-related contents for the first version of the database management software obtained from the software-cache, (b) a data agent associated with the first version of the database management software, and (c) a media agent for accessing database-data; executing the software-container by the proxy server, wherein the first version of the database management software executes therein, and wherein, based on instructions received by the data agent and the media agent executing in the software-container, from a storage manager that manages the data storage management system, a storage operation is performed for a source of database-data; and wherein the storage operation is based on using the container-related contents of the first version of the database management software obtained from the software-cache on the proxy server while the first client computing device remains uninvolved in the storage operation.

The above-recited method wherein on creating the first software-container, a catalog which is associated with the software-cache on the proxy server is updated to indicate when the template in the software-cache was used for creating the first software-container. The above-recited method wherein the determining is based on analyzing a catalog which is associated with the software-cache on the proxy server; and wherein on restoring the template to the software-cache, the catalog is updated to indicate when the template was added to the software-cache, and wherein on creating the first software-container, the catalog is updated to indicate when the template in the software-cache was used for creating the first software-container.

According to yet another illustrative embodiment, a method for performing storage operations in a data storage management system may comprise: receiving, by a proxy server, parameters for performing a first storage operation in the data storage management system, wherein the parameters comprise: a version of database management software, and a first data source for the storage operation; based on the received parameters, creating by the proxy server a first software-container comprising: an instance of the version of database management software, an instance of a data agent associated with the version of database management software, and an instance of a media agent for accessing at least one of the first data source and a destination for data to be generated in the storage operation; activating the first software-container on the proxy server; registering as a first client with a storage manager, by the instance of the data agent executing in the activated first software-container, wherein the storage manager manages storage operations in the data storage management system; communicatively coupling the first data source with the instance of the version of database management software executing in the activated software-container; performing the first storage operation using the first data source, wherein the first storage operation is performed at least in part by the first instance of the version of database management software, the first instance of the data agent, and the first instance of the media agent executing in the activated first software-container; and on completion of the first storage operation, de-registering as the first client by the data agent and destroying the first software-container by the proxy server.

The above-recited method may further comprise: while the first software-container actively operates on the proxy server: (a) activating a second software-container on the proxy server, comprising (i) a second instance of the version of database management software, (ii) a second instance of the data agent, and (iii) a second instance of the media agent, (b) registering as a second client with the storage manager, by the second instance of the data agent executing in the activated second software-container, (c) communicatively coupling the first data source with the second instance of database management software executing in the activated second software-container, and (d) performing a second storage operation using the first data source, wherein the storage operation is performed at least in part by the second instance of the version of database management software, second instance of the data agent, and the second instance of the media agent executing in the activated second software-container, wherein the second storage operation is performed independently of the first storage operation performed by components executing in the activated first software-container. The above-recited method may further comprise: while the first software-container actively operates on the proxy server: (a) activating a second software-container on the proxy server, comprising (i) a second instance of the version of database management software, (ii) a second instance of the data agent, and (iii) a second instance of the media agent, (b) registering as a second client with the storage manager, by the second instance of the data agent executing in the activated second software-container, (c) communicatively coupling a second data source with the second instance of database management software executing in the activated second software-container, and (d) performing a second storage operation using the second data source, wherein the storage operation is performed at least in part by the second instance of the version of database management software, second instance of the data agent, and the second instance of the media agent executing in the activated second software-container, wherein the second storage operation is performed by components executing in the activated second software-container independently of the first storage operation performed by components executing in the activated first software-container.

The above-recited method wherein the parameters for performing the first storage operation are received by the proxy server from the storage manager. The above-recited method wherein the instance of the data agent and the instance of the media agent are configured in a decoupled mode with an instance of storage management software in the first software-container until the first software container is activated. The above-recited method wherein the instance of the version of database management software, the instance of the data agent associated with the version of database management software, and the instance of the media agent are obtained from a software-cache configured on the proxy server. The above-recited method wherein the instance of the version of database management software, the instance of the data agent associated with the version of database management software, and the instance of the media agent are obtained from a software-cache configured on the proxy server; and wherein a catalog associated with the software-cache tracks the contents of the software-cache and is updated to indicate when software-cache contents are used in a software-container on the proxy server. The above-recited method wherein the instance of the version of database management software, the instance of the data agent associated with the version of database management software, and the instance of the media agent are obtained from a software-cache configured on the proxy server; wherein a catalog associated with the software-cache tracks the contents of the software-cache and is updated to indicate when software-cache contents are used in a software-container on the proxy server; and reporting, by the proxy server to an index server in communication with the proxy server and with the storage manager, updates that are entered into the catalog associated with the software-cache on the proxy server.

The above-recited method may further comprise: determining whether a software-cache configured on the proxy server comprises files that match the parameters for performing the first storage operation; when the files matching the parameters for performing the first storage operation are found in the software-cache on the proxy server, the first software-container is created from contents obtained from the software-cache. The above-recited method wherein on creating the first software-container, a catalog which is associated with the software-cache on the proxy server is updated to indicate when contents of the software-cache were used for creating the first software-container. The above-recited method may further comprise: determining whether a software-cache configured on the proxy server comprises files that match the parameters for performing the first storage operation; when one or more files matching the parameters for performing the first storage operation are lacking from the software-cache on the proxy server, initiating, by the proxy server, a backup operation of a home directory for the version of database management software comprising one or more of (i) executable files, (ii) configuration files, and (iii) library files, wherein the backup operation stores a copy of the respective files to the software-cache on the proxy server, thereby populating the software-cache with container-related contents for the version of database management software used in the first storage operation. The above-recited method wherein on populating the software-cache, a catalog which is associated with the software-cache on the proxy server is updated to indicate when contents were added to the software-cache.

The above-recited method may further comprise: determining whether a software-cache configured on the proxy server comprises files that match the parameters for performing the first storage operation; when one or more files matching the parameters for performing the first storage operation are lacking from the software-cache on the proxy server, initiating, by the proxy server, a restore operation of the one or more matching files from respective secondary copies thereof stored in a secondary storage device in communication with the proxy server, thereby populating the software-cache with the one or more files matching the parameters for performing the first storage operation. The above-recited method wherein on populating the software-cache, a catalog which is associated with the software-cache on the proxy server is updated to indicate when contents were added to the software-cache. The above-recited method may further comprise: determining whether a software-cache configured on the proxy server comprises stubs for files that match the parameters for performing the first storage operation; when one or more files matching the parameters for performing the first storage operation are represented by respective stubs in the software-cache on the proxy server, initiating, by the proxy server, a restore operation of the one or more matching files from respective archive copies thereof stored in a secondary storage device in communication with the proxy server, thereby populating the software-cache with the one or more files matching the parameters for performing the first storage operation. The above-recited method wherein on populating the software-cache, a catalog which is associated with the software-cache on the proxy server is updated to indicate when contents were added to the software-cache.

The above-recited method may further comprise: determining whether a software-cache configured on the proxy server comprises a template for the first software-container that matches the parameters for performing the first storage operation; when the template matching the parameters for performing the first storage operation is found in the software-cache on the proxy server, the first software-container is created from the template obtained from the software-cache. The above-recited method wherein on creating the first software-container, a catalog which is associated with the software-cache on the proxy server is updated to indicate when the template in the software-cache was used for creating the first software-container. The above-recited method may further comprise: determining whether a software-cache configured on the proxy server comprises a template for the first software-container that matches the parameters for performing the first storage operation; and when the template matching the parameters for performing the first storage operation is represented by a stub in the software-cache on the proxy server, initiating, by the proxy server, a restore operation of the template from an archive copy thereof stored in a secondary storage device in communication with the proxy server, thereby populating the software-cache with the template for the software-container matching the parameters for performing the first storage operation. The above-recited wherein the determining is based on analyzing a catalog which is associated with the software-cache on the proxy server; and wherein on restoring the template to the software-cache, the catalog is updated to indicate when the template was added to the software-cache, and wherein on creating the first software-container, the catalog is updated to indicate when the template in the software-cache was used for creating the first software-container. The above-recited method wherein the first storage operation is a backup of the first data source from a snapshot of primary data stored on a primary data storage device accessible to a client computing device to the destination, and wherein the destination is a secondary copy of the snapshot stored to a secondary storage device in communication with the proxy server; and wherein the client computing device operates independently of and uninvolved with the performing of the first storage operation. The above-recited method wherein the first storage operation is an archiving of the first data source from a snapshot of primary data stored on a primary data storage device accessible to a client computing device to the destination, and wherein the destination is an archive copy of the snapshot stored to a secondary storage device in communication with the proxy server; and wherein the client computing device operates independently of and uninvolved with the performing of the first storage operation.

The above-recited method wherein the first storage operation is a restore of the first data source from a secondary copy of data stored in a secondary storage device in communication with the proxy server to a logical volume configured on a primary storage device, and wherein the restored data in the logical volume is accessible as primary data to the first instance of the version of the database management system executing in the first software container on the proxy server. The above-recited method wherein on creating the first software-container, a catalog on the proxy server is updated to indicate when contents of the first software-container were used for creating the first software-container. The above-recited method wherein on completion of the first storage operation a catalog on the proxy server is updated to indicate when contents of the first software-container were last used in the first software-container. The above-recited method wherein a plurality of other storage operations are performed, by components of other respective software-containers activated on the proxy server, concurrently with the first storage operation without a namespace conflict therebetween in regard to one or more of: a name of the respective instance of database management software executing in a given software-container, a name of the respective data source for the respective storage operation in a given software-container, and a name of the respective destination for the respective storage operation in a given software-container.

In other embodiments, a system or systems may operate according to one or more of the methods and/or computer-readable media recited in the preceding paragraphs. In yet other embodiments, a method or methods may operate according to one or more of the systems and/or computer-readable media recited in the preceding paragraphs. In yet more embodiments, a computer-readable medium or media, excluding transitory propagating signals, may cause one or more computing devices having one or more processors and non-transitory computer-readable memory (e.g., a database server, a proxy server, a storage manager) to operate according to one or more of the systems and/or methods recited in the preceding paragraphs.

Terminology

Conditional language, such as, among others, “can,” “could,” “might,” or “may,” unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and/or steps. Thus, such conditional language is not generally intended to imply that features, elements and/or steps are in any way required for one or more embodiments or that one or more embodiments necessarily include logic for deciding, with or without user input or prompting, whether these features, elements and/or steps are included or are to be performed in any particular embodiment.

Unless the context clearly requires otherwise, throughout the description and the claims, the words “comprise,” “comprising,” and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense, i.e., in the sense of “including, but not limited to.” As used herein, the terms “connected,” “coupled,” or any variant thereof means any connection or coupling, either direct or indirect, between two or more elements; the coupling or connection between the elements can be physical, logical, or a combination thereof. Additionally, the words “herein,” “above,” “below,” and words of similar import, when used in this application, refer to this application as a whole and not to any particular portions of this application. Where the context permits, words using the singular or plural number may also include the plural or singular number respectively. The word “or” in reference to a list of two or more items, covers all of the following interpretations of the word: any one of the items in the list, all of the items in the list, and any combination of the items in the list. Likewise the term “and/or” in reference to a list of two or more items, covers all of the following interpretations of the word: any one of the items in the list, all of the items in the list, and any combination of the items in the list.

In some embodiments, certain operations, acts, events, or functions of any of the algorithms described herein can be performed in a different sequence, can be added, merged, or left out altogether (e.g., not all are necessary for the practice of the algorithms). In certain embodiments, operations, acts, functions, or events can be performed concurrently, e.g., through multi-threaded processing, interrupt processing, or multiple processors or processor cores or on other parallel architectures, rather than sequentially.

Systems and modules described herein may comprise software, firmware, hardware, or any combination(s) of software, firmware, or hardware suitable for the purposes described. Software and other modules may reside and execute on servers, workstations, personal computers, computerized tablets, PDAs, and other computing devices suitable for the purposes described herein. Software and other modules may be accessible via local computer memory, via a network, via a browser, or via other means suitable for the purposes described herein. Data structures described herein may comprise computer files, variables, programming arrays, programming structures, or any electronic information storage schemes or methods, or any combinations thereof, suitable for the purposes described herein. User interface elements described herein may comprise elements from graphical user interfaces, interactive voice response, command line interfaces, and other suitable interfaces.

Further, processing of the various components of the illustrated systems can be distributed across multiple machines, networks, and other computing resources. Two or more components of a system can be combined into fewer components. Various components of the illustrated systems can be implemented in one or more virtual machines, rather than in dedicated computer hardware systems and/or computing devices. Likewise, the data repositories shown can represent physical and/or logical data storage, including, e.g., storage area networks or other distributed storage systems. Moreover, in some embodiments the connections between the components shown represent possible paths of data flow, rather than actual connections between hardware. While some examples of possible connections are shown, any of the subset of the components shown can communicate with any other subset of components in various implementations.

Embodiments are also described above with reference to flow chart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products. Each block of the flow chart illustrations and/or block diagrams, and combinations of blocks in the flow chart illustrations and/or block diagrams, may be implemented by computer program instructions. Such instructions may be provided to a processor of a general purpose computer, special purpose computer, specially-equipped computer (e.g., comprising a high-performance database server, a graphics subsystem, etc.) or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor(s) of the computer or other programmable data processing apparatus, create means for implementing the acts specified in the flow chart and/or block diagram block or blocks. These computer program instructions may also be stored in a non-transitory computer-readable memory that can direct a computer or other programmable data processing apparatus to operate in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the acts specified in the flow chart and/or block diagram block or blocks. The computer program instructions may also be loaded to a computing device or other programmable data processing apparatus to cause operations to be performed on the computing device or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computing device or other programmable apparatus provide steps for implementing the acts specified in the flow chart and/or block diagram block or blocks.

Any patents and applications and other references noted above, including any that may be listed in accompanying filing papers, are incorporated herein by reference. Aspects of the invention can be modified, if necessary, to employ the systems, functions, and concepts of the various references described above to provide yet further implementations of the invention. These and other changes can be made to the invention in light of the above Detailed Description. While the above description describes certain examples of the invention, and describes the best mode contemplated, no matter how detailed the above appears in text, the invention can be practiced in many ways. Details of the system may vary considerably in its specific implementation, while still being encompassed by the invention disclosed herein. As noted above, particular terminology used when describing certain features or aspects of the invention should not be taken to imply that the terminology is being redefined herein to be restricted to any specific characteristics, features, or aspects of the invention with which that terminology is associated. In general, the terms used in the following claims should not be construed to limit the invention to the specific examples disclosed in the specification, unless the above Detailed Description section explicitly defines such terms. Accordingly, the actual scope of the invention encompasses not only the disclosed examples, but also all equivalent ways of practicing or implementing the invention under the claims.

To reduce the number of claims, certain aspects of the invention are presented below in certain claim forms, but the applicant contemplates other aspects of the invention in any number of claim forms. For example, while only one aspect of the invention is recited as a means-plus-function claim under 35 U.S.C sec. 112(f) (AIA), other aspects may likewise be embodied as a means-plus-function claim, or in other forms, such as being embodied in a computer-readable medium. Any claims intended to be treated under 35 U.S.C. § 112(f) will begin with the words “means for,” but use of the term “for” in any other context is not intended to invoke treatment under 35 U.S.C. § 112(f). Accordingly, the applicant reserves the right to pursue additional claims after filing this application, in either this or in a continuing application. 

What is claimed is:
 1. A method associated with a data storage management system, the method comprising: on a first client computing device, identifying by a software-discovery module executing thereon, a home directory for a first version of a database management software that executes on the first client computing device, wherein the software-discovery module discovers in the home directory container-related contents for the first version of the database management software, wherein the contents include one or more of (i) executable files of the first version of database management software, (ii) configuration files of the first version of database management software, and (iii) library files of the first version of database management software; determining whether a software-cache configured on a proxy server comprises files that match the container-related contents for the first version of the database management software discovered on the first client computing device; when one or more files matching the container-related contents for the first version of the database management software discovered on the first client computing device are lacking from the software-cache on the proxy server, initiating, by the proxy server, a backup operation of the home directory for the first version of the database management software, wherein the backup operation creates a copy of the container-related contents of the home directory and stores the copy to the software-cache on the proxy server, thereby populating the software-cache with the container-related contents for the first version of the database management software; creating, by the proxy server, a software-container comprising (a) container-related contents for the first version of the database management software obtained from the software-cache, (b) a data agent associated with the first version of the database management software, and (c) a media agent for accessing database-data on a storage device; executing the software-container by the proxy server, wherein the first version of the database management software, the data agent, and the media agent execute therein; receiving by the data agent and the media agent executing in the software-container instructions to perform a storage operation on a source of database-data associated with the database management software, wherein the instructions are received from a storage manager that manages the storage operation; and performing the storage operation comprising connecting the first version of the database management software executing in the software-container to the source of database-data.
 2. The method of claim 1 further comprising: updating a catalog which is associated with the software-cache, on the proxy server, to indicate when the container-related contents of the first version of the database management software were used to create the software-container.
 3. The method of claim 1 further comprising: determining, by the proxy server, whether an amount of storage space occupied by the software-cache exceeds a threshold; when the threshold has been exceeded, applying one or more archiving rules to identify for archiving a set of contents stored in the software-cache; and archiving the identified set of contents stored in the software-cache to one or more secondary storage devices in communication with the proxy server, thereby causing the amount of storage space occupied by the software-cache to fall below the threshold.
 4. The method of claim 1 further comprising: determining, by the proxy server, whether an amount of storage space occupied by the software-cache passes a threshold; when the threshold has been passed, applying one or more archiving rules to identify for archiving a set of contents stored in the software-cache, wherein the one or more archiving rules favor archiving lesser-used contents of the software-cache as compared to other contents of the software-cache; and archiving the identified set of contents from the software-cache into respective secondary copies stored to one or more secondary storage devices in communication with the proxy server, thereby satisfying the threshold, wherein a stub pointing to a respective secondary copy replaces the archived set of contents in the software-cache.
 5. The method of claim 1 further comprising: determining, by the proxy server, whether an amount of storage space occupied by the software-cache passes a threshold; when the threshold has been passed, identifying a set of contents stored in the software-cache, based on one or more of: when last-used in a software-container, how often used in software containers operating on the proxy server, a version number of the contents, and an age of a version of the contents; and archiving the identified set of contents from the software-cache into respective secondary copies stored to one or more secondary storage devices in communication with the proxy server, thereby satisfying the threshold, wherein a stub pointing to a respective secondary copy replaces the archived set of contents in the software-cache.
 6. The method of claim 1 wherein the determining whether the software-cache configured on the proxy server comprises files that match the discovered container-related contents of the home directory for the first version of the database management software is based on analyzing a catalog on the proxy server that comprises an index of the contents of the software-cache.
 7. The method of claim 1 wherein the executing of the software-container comprises the data agent registering as a client with the storage manager, thereby enabling the storage operation to proceed.
 8. The method of claim 1 wherein the storage operation is a backup that generates a secondary copy of the source of database-data associated with the database management software, and wherein the secondary copy is stored by the media agent to a secondary storage device in communication with the proxy server.
 9. The method of claim 1 wherein the storage operation restores the source of database-data, which is a secondary copy stored in a secondary storage device in communication with the proxy server, to a format and location that are accessible as primary data to the first version of the database management software executing in the software-container on the proxy server.
 10. The method of claim 1 wherein the source of database-data is a clone of a snapshot of primary data residing within a logical volume configured on a storage device, and wherein the clone is accessible as primary data to the first version of the database management software that executes in the software-container on the proxy server, while the first client computing device lacks access to the clone.
 11. A method associated with a data storage management system, the method comprising: on a first client computing device, executing a software-discovery module to identify a home directory for a first version of a database management software that executes on the first client computing device, wherein the software-discovery module discovers in the home directory container-related contents for the first version of the database management software, including one or more of (i) executable files of the first version of database management software, (ii) configuration files of the first version of database management software, and (iii) library files of the first version of database management software; determining whether a software-cache configured on a proxy server that is a component of the data storage management system comprises a template for a software-container comprising files that match the container-related contents of the home directory for the first version of the database management software discovered by the software-discovery module on the first client computing device; when the template is represented by a stub in the software-cache, initiating, by the proxy server, a restore operation of the template from an archive copy thereof stored in a secondary storage device in communication with the proxy server, thereby populating the software-cache with the template for the software-container; when the template is not found in the software-cache and further when a stub for the template also is not found in the software-cache, initiating, by the proxy server, a backup operation of the home directory for the first version of the database management software, wherein the backup operation creates a copy of the container-related contents of the home directory and stores the copy to the software-cache on the proxy server, thereby populating the software-cache with the container-related contents for the first version of the database management software, and creating the template in the software-cache; creating, by the proxy server, a software-container based on the template obtained from the software-cache, the software-container comprising (a) the container-related contents for the first version of the database management software obtained from the software-cache, (b) a data agent associated with the first version of the database management software, and (c) a media agent for accessing database-data; executing the software-container by the proxy server; receiving by the data agent and the media agent executing in the software-container instructions to perform a storage operation on a source of database-data associated with the database management software, wherein the instructions are received from a storage manager that manages the storage operation; and performing the storage operation comprising connecting the first version of the database management software executing in the software-container to the source of database-data; and wherein the storage operation is based on using the container-related contents of the first version of the database management software obtained from the software-cache on the proxy server while the first client computing device remains uninvolved in the storage operation.
 12. The method of claim 11 wherein on creating the software-container, a catalog which is associated with the software-cache on the proxy server is updated to indicate when the template in the software-cache was used for creating the software-container.
 13. The method of claim 11 wherein the determining is based on analyzing a catalog which is associated with the software-cache on the proxy server; and wherein on restoring the template to the software-cache, the catalog is updated to indicate when the template was added to the software-cache, and wherein on creating the software-container, the catalog is updated to indicate when the template in the software-cache was used for creating the software-container. 